This is completely safe. The board is only a jumper for the PSU nothing more plus it gives you the option to power the system with only one button. You can basically do this with a piece of wire and switch the PSU on and off using the built in switch. The max voltage is 12V so it is safe. You can use this long term no problem. You can even find cases that can take 2 PSU and have a build in board like this.
Hi bro plz help me can use a 230v psu to power my gpu only RX 570 and 450w psu to power my system I realy collected money from 4years to buy a GPU and now its keep restarting plz help
what that little board do is when it receive electricity from the main PSU, it will turn on a transistor which will shorting the power_on wire to ground of the second PSU which will tell it to turn on. When the main PSU is turned off then there will be no more voltage to hold the transistor thus it will release the power_on pin and then PSU 2 will shutdown automatically
As a guy who is very interested in electronics I can say that this is not a bad idea every time. You just need to understand what you are doing and you have to be aware of certain limitations: old PSUs often if not always require a load on the 5v rail in order to work properly. (Hook up the optical drive for example)
This was all the rage with Alienware X51's from 5 or so years ago. Many of them ran on sub 200 watt power bricks. That's correct. A desktop that ran on an external power brick. They were tossing GTX 680 FTW's in them and powering them with a separate PSU.
I did this when i had 2 R9 290X videocards in my system. Which also had 2 X5650 Xeons.. Power draw was a huge issue so i got a cheap psu just to power one of the 2 cards. Worked amazing!
So question.. in theory could I run that gpu on a 2nd psu that isn't connected to the computer at all? As in just plug the PSU into the wall, and plug the power into the GPU. Will the GPU regulate itself for power or is the motherboard responsible for that voltage regulation?
@@TrueHelpTV I've done exactly that and everything seems to be working fine although the GPU only turns on after the PSU connected to the motherboard is on
Would be interesting to see how that board ran with one of the PicoPSU's used JUST for the GPU. The reason I say that is because of how small they are, so easier to hide inside a case EXACTLY for the use you suggested (Dell or HP PC)
All this board does is use the (green) on/off wire from main PSU and send a signal to it from molex to turn on/off, you can use the paper clip method instead of this board but it's more unstable
not if you bend the paper clip so it actually contacts well... Or just use a standard bread board jumper wire (slightly smaller than paper clip diameter, and its insulated) and you can easily bend a spring hook on the end for perfect contact and a tight fit. That's what I do for powering my LiPo battery charger and a cooling fan. No connection issues and it gets moved almost daily.
Jake Garrett for extra fans that my motherboard don't support I simply cut the fan connector off and connected the red and black fan wires to a cut usb cable so I can pretty much plug it in and use it by just plugging in usb into PC or wall charger. Works for pretty much anything that needs power, instead of running a full power supply. Much simpler and all you need is scissors/knife and a cheap usb cable (a wall adaptor if you want to plug it into the wall, don't use direct wall plug as it will just kill anything small because it pushes too much power.)
Magic mushroom I'm using a half baked 500w PSU for the battery charger. I would hate for it to ruin my 1000w power supply and my rather expensive desktop. I usually just plug wires into the 8 pin (GPU) cables, or molex, or 24 pin. Any yellow and black wire should be fine. Or if you want 7v (slow down a fan), use the +5 as the "ground" and the +12. That is something I actually use sometimes, or a boost/buck converter (I have 1 fan running 20v in my desktop because it had harmonic resonance with my case inlet and made a whistle sound, so I sped it up). It would probably be safe to run off molex, but I already had a spare PSU and I don't need to leave my PC on.
I think this kind thing is very common in servers especially deep learning and machine learning servers. There's a server rack at my local uni that has something like a 1600W back up PSU meant to power 8 1080s.
just to be safe, make sure to connect some case fan or old disk drive on to the second PSU, just to make sure there is at least some constant load on the second psu, running psu without any load can damage it or shorten its life.
That is a really cool idea. Wish I had known this back when I had my first gaming PC 5 years ago which was literally an ancient Dell Optiplex PC with a radeon HD 7750. The case was too short for the graphics card so I had to keep the side panel off and it was only an intel dual core PC with 2gb of DDR2 ram and I had to use an external hard drive I had lying around for storage cause the HDD was too small. Back in the day when parts were terribly expensive and not very powerful and I had no money and only a part time job. Those were the days!
Just wondering; why do you need that little board? Couldn't you just put the 6-pin connector into the GPU and power the PSU on manually after the initial startup?
this is 100% safe, maybe not practical but dual psu's have been a thing literally forever. the only issues are when you start splicing the main 24 pins of two psu's together as if one fails it can cause some rather unexpected results (reversing circuits)
Most legit servers run at least 2 PSU's, and as an industrial electronic engineering tech, this is actually fine. The Molex brings the DC ground (Black) on both PSU's together, meaning that 5V is 5V on both, and the Molex 5V (red) syncs the second PSU to the system. The only issue with your system is the chassis ground is not present on the second PSU, meaning the noise potential on the line is higher, as is the chance for some other weird issues.
As someone that used to do this quite often at work, I didn't watch to the end. Did you know you can bridge the 2 pins (ground and ps_on#) this will power the PSU also? This is usually the green pin and the black pin on old, cheap and OEM PSUs (I know a few of the better ones use black wires for all connections now). We often used a paperclip or small piece of scrap wire to bridge the connections. You can also get very, very cheap small 24-pin female to female adaptors with a wire already bridging the correct pins.
You don't need to use the adapter board. All you need is to short out the green wire and any ground wire and the PSU will turn on. I have powered a gpu off a seperate PSU in this same way.
You don't need to buy into that molex to 24 pin connector crap. All you need to do is connect the green wire and any black wire on the 24 pin with a paper clip and plug it in and the power supply will start right up.
The little card is shorting the green one, when the other one is powered. It's so you can have it all in a case as a permanent solution. (You want to manually short it every time you start your pc?) I used to have a little adapter that connected both pairs of green cables to the motherboard in order to do the same thing. Used that for more than 4 years.
Says he doesnt care how safe people are, he thinks is a bad idea, then says 2:00 how hes "not electronically clever". Then why are you giving advice and doing a review?
I have an electronics degree. This should totally be safe. It's basically using power from that connector just to activate a switch to short the connector. Your motherboard does something similar when the power switch is turned on. It's arguably safer than trying to splice the same wires from the second PSU together if you don't know what you're doing.
I dont know if you're gonna awnser but, is it safe to do this just connecting the second psu to the current and jump starting it while at the same time connecting the 6 PIN from second PSU to my dedicated GPU, power on secondary PSU and after that powering on my main PSU connected to my mobo, ram, ssd, hdd, and other pc components ¿Would it be safe to use it like this? Without any adapter.
@@Apologized9 I am not 100% sure I understand the question, but you generally want the 2 PSUs to come on around the same time so everything has power when you turn the computer on
He DID do that.6 pin cable from secondary PSU does go to the GPU. You can see in the video. He just didnt mention it. That board is simply for powering second PSU simultaneously .
That molex's use is to switch on the second PSU as soon as the first one is on, of course you can short it yourself but the timing may cause some issue.
Seen a few "ghetto" builds that are dual PSU. At one time, you could actually get a specific "graphics PSU" that fitted in a 5 1/4" bay - they are probably retro collectors items these days
RandomGaminginHD I love your videos. You help me by providing me with budget parts for a PC build. Plus, your videos are really entertaining, even to someone who isn't a tech junkie. 👍
Its safe to do, I've once ran 3 PSU's to power a GTX 580 as I didn't have one strong enough laying around, Though I'm not sure what the point is with that little circuit board, there is an extension you can get that plugs into the 24pin that also plugs into the primary PSU's 24pin and has a block that looks like the 24pin with only 2 wires you plug into the 2nd PSU, this allows both PSU's to turn on and off with the power button. Back in the day mountain mod mad a case the accepted 2 PSU's, though back then PSU's were not really good, so I would of imagine that for the extreme water cooled PC back then, it would make sense to have 1 PSU for the system and the other for water cooling gear and power up multiple graphics cards.
There is absolutely nothing unsafe or unstable about using two PSU's, I don't know why you would think there is. The components could care less that they are drawing power from different sources. Hell I used a paper clip to short the sense wires so I could run a second PSU, never once had an issue.
Do you know if it is safe to power my GPU (Rx 570) with an aftermarket psu and the rest of the PC with a 280 W Fujitsu PSU? :D The motherboard only supports a 16 pin connector...
@@razmuzen1090 Absolutely, like I said, the components don't care where they get power from. Just make sure you power up the GPU before starting the computer, and only shut off the GPU power AFTER the PC has been fully shut down.
Well, a modern PSU is always in standby, ready to turn on if you give it the right signal, That signal is indeed when two wires are shorted together. More specifically, the green one and any of the black ones. That board is probably little more than a transistor that does that when it receives power from the primary PSU. I wouldn't recommend it but it should work. Problems could arise if one PSU regulates itself to, say, slightly more than the voltage it should and the other one slightly less. Then one of them will do most of the work since the other one thinks it's giving it all the current it needs to maintain the specified voltage. Due to the resistance in the wires though, it's sort of self-regulating and most of the time it should be fine, but it's bad form nonetheless.
I know this was five years ago but you are one of the few in the comments who has a brain. Wire splicing can solve lots of issues but some people just overcomplicate matters for no reason. You are one of the few intelligent ones RoomerJ. Congrats.
My friend and I used one of these to hookup a desktop gpu to his laptop using a miners pcie to mini-pcie (wifi card port) and it worked pretty well. He bought a gtx 580 and built a box to house it. It'd be a good project for your channel.
Hey, just some quick tips on the way a power supply works. When you press the power button it connects two pins, which powers on the unit. All this is doing is repeating the same action with the secondary unit, it is safe. ^-^ It'll feed power as safely and reliably as it would were it in a system on its own.
There is no reason why it would be a problem when using the PCB. The molex connector must be using the 5 volt wire to power the small circuit on the PCB to short the green wire to ground on the 24 pin connector. Also, it is like using a black wire (ground) to make sure the ground potential is the same in the added PSU. It's a bit getto, but it should work just fine and is safe. Likely safer that overloading the underpowered PSU in the PC. Some people think they can power their 8 pin GPU with just one yellow wire with a cobbled together molex adapter. Now that can be not safe. PSUs have safety features, for shorting and over current. However, a single 18 awg wire will start on fire long before the PSU sees any problems. GPUs only use 12volts, but when you have an 8 pin connector the CPU draws a lot of current. Thus needs four 12v positive wires (yellow) and four ground wires (black) to care the load.
There is actually nothing wrong with powering up a PSU via shorting two pins in the connector. In this case these are: the one with green cable to any of these with black cables. This is the only way to do this, and it's done the same way in a motherboard. The card, as many others told before, is there to sync the powering up of both PSUs. I'm rather wondering if the graphics card in that kind of setup isn't a bit more stressed out (mostly on VRMs) since the voltages may be different in both PSUs.
As a computer builder and a amature electronics hobbyist I don't see any issues with this other then that the second PSU will have to chill outside the PC case unless you have a case large enough to shove it inside (and even still that would be a bad idea because of the added heat) The only issue I can maybe think of is that a crappy PSU like any other crappy PSU can die and take out the Graphics card and what ever its connected to on the motherboard. JUst make sure not to get some old AF 2000's brand (or todays vintage) Chinese brands (My Corsair TX650 has been powering my compute for nearly 8 years now without issue)
You see, there is a green wire on the 24-pin connector, and if you short it to ground the PSU will function while it is grounded, you could just take a wire and connect a pin whose cable on the other side is black and connect it to the pin with the green on the other side and voilà, whenever you turn on the PSU it will automatically start, you don't even need that chip, just power on the second PSU after you start the system
Recently did this with a friends PC. Was a prebuilt HP with a weird motherboard. Ended up using a 2nd PC, sandwiched the 2 together and ran the 6 pin from one PC to the other so the gtx 660 had power. Quite a funny way to run a PC.
This is exactly what I just did today. it's working so far but since I'm not super computer literate, only semi-literate, I came here to see if what I'm doing will cause any issues. so far my new tower is doing this weird thing where after the welcome screen when logging on, the screen stays black for like 5 minutes before the desktop shows up. so I'm not really sure what that's about.
Did this for a while about ten years ago (with an AT PSU) with a dell oem setup to run a GPU as well as an extra HDD. even though the motherboard had 4 SATA ports the included PSU only had a single SATA power connector.
The only thing that board does is detecting voltage and give the secondary PSU the 'power on' signal. For the primary PSU nothing has changed, if the PSU detects something bad it will shut off (read: no compromise). The secondary PSU is on a fixed ON state and will probably only switch off when the primary PSU also shuts down. So on the safety side the secondary PSU is possibly compromised. But this might also differ from PSU to PSU, contact your PSU manufacturer for the final answer on that one.
You can cut the green wire on the second psu and put a connector to connect it to the green wire on the first psu, it should power up exactly at the same time as the first power supply, reducing the load the first one have when powering up the computer until it gets 12v and the second psu turn on. You can cut the 2nd psu cables and connect them directly to the molex 6 or 8 pin adaptor.
You don't even need to do that just take a ground wire and attach it from the second PSU to the case and it will connect to ground together the case is because the PSU mounting connects the ground from the PSU to the connecting a ground wire from the 2 PSU to the case will do the same thing
Thanks for sharing bro, actually the only purpose of the tiny board is to GIVE MORE WATTS power to your 300 watts PSU making it more powerful, that's why it only has Capacitors and resistors on it. But if what you need is just to POWER your GPU, then directly plugging the 6 PINS to your GPU from the External PSU works just fine, and it won't harm anytime since computer PSU's are well regulated by themselves. But honestly, if my "PC Case" can fit a 700 Watts "used" PSU from EBay or Amazon that will only cost about $15 dollars (which they are) now, then that's the best option.
@@mikeysgametime8914I didn't tried the tiny board trick. Instead, I use an additional external PSU from my other builds and use it exclusively to power my Graphics card, works like a charm. Now, I never run out of Power on my Graphics card, and never restart itself since then.
I once ran the DIY version of this. Manual toggle switch to jump start the Second PSU at about the same time as the first PSU. Works fine, and yes it is safe unless one of your PSU's is already a fire hazard.
I mean phanteks not only has a psu splitter, but has a psu combiner. This would properly take the 24 pins of both psu's (and even both 8 pins if you want) and can not only act as a dual psu for things like extra graphics cards, but also acts as redundancy so if each psu is only connected to its load worth (my plans is to have a dual 1000w power supplies, have redundant power to my 1950x and then 2 vega 64's per psu) Don't tell me how crazy I am, as I use this for 3D animation and I can go for a bump over my current 5960x and 4 290x's. Edit: these currently run on a 1600w psu from evga, I am not sure if I'm going to corsair or staying with evga, as if I can get corsair link working for both power supplies, then I'm going corsair
You can basically ignore the PSU recommendations of every GPU-manufacturer because they advice for the worst-case cheap china PSU`s. A new entry level system with an RX560 and pentium for example draws barely 80W under gaming-load. Even my System with a GTX 1070 + Xeon E3-1231v3 draws only around 310W from the wall while gaming (bf4).
Dang you released this video as I was waiting on parts to do something like this too, but using a dell power brick so it's alot less messy. Great vid, man!
How *this* specific adapter board appears to work is it; -Connects the APU to the system's ground rail - Detects voltage from the PSU and turns on the APU - The sequence of events that it operates by; the primary psu turns on (as indicated by outputting voltage to more than just the standby); the adapter board receives power and uses that power to signal the APU to power on (this is achieved by connecting the 'green' soft-start wire on the APU to ground) Acronyms used; APU - Auxiliary Power Unit PSU - (Primary) Power Supply Unit
Hey, could you help a little¿? i tried the same method as the video, but i don't have any adapter, i just jumpstarted secondary PSU(500w) my main one is 200w, im using the secondary PSU to power my GPU (RX 580) but whenever i turn on my PC using this configuration first start 500W PSU to powerup GPU and then 200W PSU to power up system thus giving power to the GPU through the 6 pin connector from the 500W PSU, my PC just restarts itself over and over and over again. ¿Do i need anything else to make it work? Besides the adapter which i don't have. I turn the PC with the GPU connected but not giving it power through the 6 pin connector from my secondary PSU(500w one) it starts just fine.
Basically the little module receives power and then sends a low volt signal on the "Power good" line of the 24-pin, like shorting a power button would.
My dad once picked up a cheap GTX 480 in an auction, leaving his 470 unused. I grabbed it and jerry-rigged it into an eMachines with a Celeron 440. It ran Crysis somewhat happily, lol. A piece of wire linking the main PSU's green wire (next to the retention clip) as well as a ground wire to the other PSU enables it to turn on with the system.
For anyone curious, you can actually build this yourself. Not sure I'd recommend it, cause if you do it wrong, you can fry your psu. But I mean u can. Just use the molex connector to power a 12v relay, which then shorts PS_ON and GND on the other powersupply.
if you want power vga with second psu, use server psu that only give 12v, alot of normal pc psu will have drop vol if load on 12v 5v 3.3v is not balance, good psu dont have this problem but you dont need second psu if you have good one. miner they use big psu or server psu to feed 12v to their gpus
Random its perfectly safe as it is just detecting the bridge that is made when the power switch is used there will be no internal spark so to speak, and is just really a sense instruction to power on.
A pico PSU and a normal power brick wouldn't be too unreasonable for a situation such as this. Plus it wouldn't look too bad, especially in and SFF build.
I use to have run an oldschool 300watt that had its own wired in switch for secondary psu. Back when i first build a file server with 20 hds in it. It had two 300watt psu's. One was an older xt i belueve it was called. That one didnt power a motherboard. For me was only for added hd power, but would have worked for gpu as well.
That little PCB that fools the PSU into thinking it is connected to a motherboard is perfectly safe, assuming it was designed properly. As an electronics engineer, I can tell you that it is a simple matter if you want ensure that PCB is safe. All you've got to do is make sure the traces are a safe width for the max current (using good old Ohm's Law) and they are spaced apart for the voltages in play (the highest is 24 V between 12 V and -12 V I think, so not even that much). Nothing really too complicated.
I have been using it for awhile now, infact i started using it before i saw this video. It has been totally safe for me, I'm powering a r9 290 with it.
I did this with ATI HD 3850 AGP, Intel Celeron 2.8Ghz Socket 478, 2x 1GB DDR1 and Windows XP. Both Power Supplies did last about 3 months, but at least my pc survive it. I had this pc (specs) from 2009-2011 and didn't have money for a better supply (only the GPU). After almost burn my pc, I did buy a better supply. After 2011 I upgrade to a Core i3 530, GTX 460 and Corsair 850w.
Just stick a little wire between only one green wire and any black wire on 26pin connector, plug in your 6 pin/8 pin or even 2 in your GPU, turn on that power supply, then one in the PC, and start it up. That's how my cousin is using his HP with i5-2400 and r9 270x.
they make cable splitters that connect the power on circuit of a second power supply to the board with the first. All that happens when you press the power button is it closes a circuit between two particular pins to tell your power supply to start supplying power, then comes the rest
This is completely safe. The board is only a jumper for the PSU nothing more plus it gives you the option to power the system with only one button. You can basically do this with a piece of wire and switch the PSU on and off using the built in switch. The max voltage is 12V so it is safe. You can use this long term no problem. You can even find cases that can take 2 PSU and have a build in board like this.
thanks for the info :)
What is the name of a board like this?
@@LookingGlass69 add2psu
You can cut the green wire on the second psu and connect it to the green wire on the first psu.
Hi bro plz help me can use a 230v psu to power my gpu only RX 570 and 450w psu to power my system I realy collected money from 4years to buy a GPU and now its keep restarting plz help
what that little board do is when it receive electricity from the main PSU, it will turn on a transistor which will shorting the power_on wire to ground of the second PSU which will tell it to turn on. When the main PSU is turned off then there will be no more voltage to hold the transistor thus it will release the power_on pin and then PSU 2 will shutdown automatically
this, i wonder if that floppy connector in the board can be used as well instead of using a molex cable
SandPox you're trying to tell people that the transistor on that board is holding 24v? Because that's utter bs.
All it does is connect the green wire (power_on) on the PSU to ground, which tells the PSU to turn on. Nothing to do with transistors.
Riley Stanish
The PSU'S are not connected in series
Riley Stanish transistors doesnt hold power, also 12v and 5v molex doesnt 24v
He pulled an Austin Evans
scrapyard wars
^ At least he hit puberty, unlike Linus lel
David Serban to power a hd 6990
ak4ik Linus is a father lol
He pulled an 3DGAMEMAN (rodney reynolds) hi did this like 12 years a go i remember. And Austin Evans was 12 years old back den.
That's a really nice psu SLI
It's a little known AMD technology called Housefire™
@@redaffix7320 lol
HUGE ANIME BREASTS
As a guy who is very interested in electronics I can say that this is not a bad idea every time. You just need to understand what you are doing and you have to be aware of certain limitations: old PSUs often if not always require a load on the 5v rail in order to work properly. (Hook up the optical drive for example)
why not use indipendent external power cable for second power supply??
"Everything powers up just fine"
Then we see "system fan faliure"
That setup has no system fan.
a 3 years reply... lol
@@SomsoKcahes not replying gang but i will 🫡
Let's be honest this is really for vega owners
Dual 1500 watt power supplies to power the water cooled card lol.
Retro/Modern Gaming at its Finest Attention Beggar
yeah but that part of for servers to power graphics cards is probably true but with a much more safe and reliable solution
250W is not that much you Nvidiot dipshit.
Unless you have a 300W PSU, you dont need this for vega lol
This was all the rage with Alienware X51's from 5 or so years ago. Many of them ran on sub 200 watt power bricks. That's correct. A desktop that ran on an external power brick. They were tossing GTX 680 FTW's in them and powering them with a separate PSU.
It's great if you can get a cheap £5 FSP Group or Delta PSU to add to an OEM system as I've powered a HD4890 off of a setup like this.
heeeeeey!
Budget-Builds Official Yeah watched your video and then came to watch rginhd vid
dont buy a small board like that. all you need to do is connect the green pin on the 24 pin connector to ground
I see where you get inspiration from .
@@BonFire201 wdym by ground?
I did this when i had 2 R9 290X videocards in my system. Which also had 2 X5650 Xeons..
Power draw was a huge issue so i got a cheap psu just to power one of the 2 cards. Worked amazing!
So question.. in theory could I run that gpu on a 2nd psu that isn't connected to the computer at all? As in just plug the PSU into the wall, and plug the power into the GPU. Will the GPU regulate itself for power or is the motherboard responsible for that voltage regulation?
@@TrueHelpTV I've done exactly that and everything seems to be working fine although the GPU only turns on after the PSU connected to the motherboard is on
Would be interesting to see how that board ran with one of the PicoPSU's used JUST for the GPU.
The reason I say that is because of how small they are, so easier to hide inside a case EXACTLY for the use you suggested (Dell or HP PC)
All this board does is use the (green) on/off wire from main PSU and send a signal to it from molex to turn on/off, you can use the paper clip method instead of this board but it's more unstable
not if you bend the paper clip so it actually contacts well... Or just use a standard bread board jumper wire (slightly smaller than paper clip diameter, and its insulated) and you can easily bend a spring hook on the end for perfect contact and a tight fit. That's what I do for powering my LiPo battery charger and a cooling fan. No connection issues and it gets moved almost daily.
Jake Garrett for extra fans that my motherboard don't support I simply cut the fan connector off and connected the red and black fan wires to a cut usb cable so I can pretty much plug it in and use it by just plugging in usb into PC or wall charger. Works for pretty much anything that needs power, instead of running a full power supply. Much simpler and all you need is scissors/knife and a cheap usb cable (a wall adaptor if you want to plug it into the wall, don't use direct wall plug as it will just kill anything small because it pushes too much power.)
Magic mushroom I'm using a half baked 500w PSU for the battery charger. I would hate for it to ruin my 1000w power supply and my rather expensive desktop. I usually just plug wires into the 8 pin (GPU) cables, or molex, or 24 pin. Any yellow and black wire should be fine. Or if you want 7v (slow down a fan), use the +5 as the "ground" and the +12. That is something I actually use sometimes, or a boost/buck converter (I have 1 fan running 20v in my desktop because it had harmonic resonance with my case inlet and made a whistle sound, so I sped it up).
It would probably be safe to run off molex, but I already had a spare PSU and I don't need to leave my PC on.
I think this kind thing is very common in servers especially deep learning and machine learning servers. There's a server rack at my local uni that has something like a 1600W back up PSU meant to power 8 1080s.
I want to get this board, but what is it called?
just to be safe, make sure to connect some case fan or old disk drive on to the second PSU, just to make sure there is at least some constant load on the second psu, running psu without any load can damage it or shorten its life.
That is a really cool idea. Wish I had known this back when I had my first gaming PC 5 years ago which was literally an ancient Dell Optiplex PC with a radeon HD 7750. The case was too short for the graphics card so I had to keep the side panel off and it was only an intel dual core PC with 2gb of DDR2 ram and I had to use an external hard drive I had lying around for storage cause the HDD was too small. Back in the day when parts were terribly expensive and not very powerful and I had no money and only a part time job. Those were the days!
Just wondering; why do you need that little board? Couldn't you just put the 6-pin connector into the GPU and power the PSU on manually after the initial startup?
Palms are sweaty, hands shakin', RandomGamingInHD Spaghetti.
Just put a paperclip in the 14th and 16th hole of your 20 or 24 pin connector
Edit: oh you mentioned it
this is 100% safe, maybe not practical but dual psu's have been a thing literally forever. the only issues are when you start splicing the main 24 pins of two psu's together as if one fails it can cause some rather unexpected results (reversing circuits)
Using 2 power supplies is the best option actually, they will last twice as long and makes troubleshooting easy
Most legit servers run at least 2 PSU's, and as an industrial electronic engineering tech, this is actually fine. The Molex brings the DC ground (Black) on both PSU's together, meaning that 5V is 5V on both, and the Molex 5V (red) syncs the second PSU to the system.
The only issue with your system is the chassis ground is not present on the second PSU, meaning the noise potential on the line is higher, as is the chance for some other weird issues.
Does this board connect the psu1 red wire to psu2 red wire? Psu1 black wire to psu2 black wire? And PSU1 yellow wire to psu2 yellow wire?
As someone that used to do this quite often at work, I didn't watch to the end. Did you know you can bridge the 2 pins (ground and ps_on#) this will power the PSU also? This is usually the green pin and the black pin on old, cheap and OEM PSUs (I know a few of the better ones use black wires for all connections now). We often used a paperclip or small piece of scrap wire to bridge the connections. You can also get very, very cheap small 24-pin female to female adaptors with a wire already bridging the correct pins.
You don't need to use the adapter board. All you need is to short out the green wire and any ground wire and the PSU will turn on. I have powered a gpu off a seperate PSU in this same way.
BRO, ¡THANK YOU, THANK YOU!
It's rare to a see well mannered guy with a growing tech channel like this.
You don't need to buy into that molex to 24 pin connector crap. All you need to do is connect the green wire and any black wire on the 24 pin with a paper clip and plug it in and the power supply will start right up.
Slywooftwo yeah I dont understand whats that card for
Mateus Elias it's so both power supplies turn on simultaneously
EvilTurkeySlices just shorting the green wire does that
The little card is shorting the green one, when the other one is powered. It's so you can have it all in a case as a permanent solution. (You want to manually short it every time you start your pc?)
I used to have a little adapter that connected both pairs of green cables to the motherboard in order to do the same thing. Used that for more than 4 years.
believe it or not, some people dont want to have to do that every time they turn on their pc.
Says he doesnt care how safe people are, he thinks is a bad idea, then says 2:00 how hes "not electronically clever".
Then why are you giving advice and doing a review?
I have an electronics degree. This should totally be safe. It's basically using power from that connector just to activate a switch to short the connector. Your motherboard does something similar when the power switch is turned on. It's arguably safer than trying to splice the same wires from the second PSU together if you don't know what you're doing.
I dont know if you're gonna awnser but, is it safe to do this just connecting the second psu to the current and jump starting it while at the same time connecting the 6 PIN from second PSU to my dedicated GPU, power on secondary PSU and after that powering on my main PSU connected to my mobo, ram, ssd, hdd, and other pc components ¿Would it be safe to use it like this? Without any adapter.
@@Apologized9 I am not 100% sure I understand the question, but you generally want the 2 PSUs to come on around the same time so everything has power when you turn the computer on
I'm powering my gpu with a car battery charger soldered to a molex to 6pin adapter. No joke.
bruh
I want to see that sh*t-
Just put one over the pc and connect it directly to the gpu (tm)
I thought that too, but if something like this exists, maybe there's a reason?
Cristian Marturet there are plenty of other useless shit like a molex to molex adapter
He DID do that.6 pin cable from secondary PSU does go to the GPU. You can see in the video. He just didnt mention it. That board is simply for powering second PSU simultaneously .
That molex's use is to switch on the second PSU as soon as the first one is on, of course you can short it yourself but the timing may cause some issue.
Oh, that's right! timings! that is a possible issue
Next video:
Powering a graphics card without a GPU
Use Test drive unlimited in your old component benchmarks! It's very well optimized and looks ok.
Paneledpear6555 2 is much better
In terms of optimization, no.
In terms of physics, hell no.
Physics are MUCH worse and it runs badly on PCs.
Seen a few "ghetto" builds that are dual PSU. At one time, you could actually get a specific "graphics PSU" that fitted in a 5 1/4" bay - they are probably retro collectors items these days
RandomGaminginHD I love your videos. You help me by providing me with budget parts for a PC build. Plus, your videos are really entertaining, even to someone who isn't a tech junkie. 👍
Its safe to do, I've once ran 3 PSU's to power a GTX 580 as I didn't have one strong enough laying around, Though I'm not sure what the point is with that little circuit board, there is an extension you can get that plugs into the 24pin that also plugs into the primary PSU's 24pin and has a block that looks like the 24pin with only 2 wires you plug into the 2nd PSU, this allows both PSU's to turn on and off with the power button.
Back in the day mountain mod mad a case the accepted 2 PSU's, though back then PSU's were not really good, so I would of imagine that for the extreme water cooled PC back then, it would make sense to have 1 PSU for the system and the other for water cooling gear and power up multiple graphics cards.
K. In finland we just plug our computers to the 400kV mainline. Enough power for those damn C2Q and Radeons.
I did this before this video came out and it didn't die...
There is absolutely nothing unsafe or unstable about using two PSU's, I don't know why you would think there is. The components could care less that they are drawing power from different sources. Hell I used a paper clip to short the sense wires so I could run a second PSU, never once had an issue.
Do you know if it is safe to power my GPU (Rx 570) with an aftermarket psu and the rest of the PC with a 280 W Fujitsu PSU? :D The motherboard only supports a 16 pin connector...
@@razmuzen1090 Absolutely, like I said, the components don't care where they get power from. Just make sure you power up the GPU before starting the computer, and only shut off the GPU power AFTER the PC has been fully shut down.
His hands are shaky.....
Kickass Movies knees weak....
Stormtrooper in the Rain arms are heavy. There's vomit on his sweater already
Bluen MOM'S SPAGHETTI
Mom's spaghetti
his eyes look fucked up too... looks like he did some drug or smt
Well, a modern PSU is always in standby, ready to turn on if you give it the right signal, That signal is indeed when two wires are shorted together. More specifically, the green one and any of the black ones. That board is probably little more than a transistor that does that when it receives power from the primary PSU. I wouldn't recommend it but it should work. Problems could arise if one PSU regulates itself to, say, slightly more than the voltage it should and the other one slightly less. Then one of them will do most of the work since the other one thinks it's giving it all the current it needs to maintain the specified voltage. Due to the resistance in the wires though, it's sort of self-regulating and most of the time it should be fine, but it's bad form nonetheless.
I've done this a hundred times. I just spliced the power relay wires together and boom. One for my Gpu, one for everything else. Never had an issue.
I know this was five years ago but you are one of the few in the comments who has a brain. Wire splicing can solve lots of issues but some people just overcomplicate matters for no reason. You are one of the few intelligent ones RoomerJ. Congrats.
well i can say i have been running duel power supply for three years now and it works
Edit:
i just use a paperclip
maikson97 please tell me more, im curious how it works with just a paper clip
@@jibpanda5388same concept but you a paper clip to short the ground and power to start the PSU
Amazing. I’m thinking about doing this with an hp until I can upgrade...
My friend and I used one of these to hookup a desktop gpu to his laptop using a miners pcie to mini-pcie (wifi card port) and it worked pretty well. He bought a gtx 580 and built a box to house it. It'd be a good project for your channel.
Shorting isn’t always bad, like when you press the power button on your pc it shorts two pins on your motherboard to turn it on
Hey, just some quick tips on the way a power supply works. When you press the power button it connects two pins, which powers on the unit. All this is doing is repeating the same action with the secondary unit, it is safe. ^-^
It'll feed power as safely and reliably as it would were it in a system on its own.
There is no reason why it would be a problem when using the PCB. The molex connector must be using the 5 volt wire to power the small circuit on the PCB to short the green wire to ground on the 24 pin connector. Also, it is like using a black wire (ground) to make sure the ground potential is the same in the added PSU. It's a bit getto, but it should work just fine and is safe. Likely safer that overloading the underpowered PSU in the PC.
Some people think they can power their 8 pin GPU with just one yellow wire with a cobbled together molex adapter. Now that can be not safe. PSUs have safety features, for shorting and over current. However, a single 18 awg wire will start on fire long before the PSU sees any problems. GPUs only use 12volts, but when you have an 8 pin connector the CPU draws a lot of current. Thus needs four 12v positive wires (yellow) and four ground wires (black) to care the load.
I was watching the HP laptop restoration, then you uploaded and I can't miss an RGINHD upload.
There is actually nothing wrong with powering up a PSU via shorting two pins in the connector. In this case these are: the one with green cable to any of these with black cables. This is the only way to do this, and it's done the same way in a motherboard. The card, as many others told before, is there to sync the powering up of both PSUs.
I'm rather wondering if the graphics card in that kind of setup isn't a bit more stressed out (mostly on VRMs) since the voltages may be different in both PSUs.
As a computer builder and a amature electronics hobbyist I don't see any issues with this other then that the second PSU will have to chill outside the PC case unless you have a case large enough to shove it inside (and even still that would be a bad idea because of the added heat)
The only issue I can maybe think of is that a crappy PSU like any other crappy PSU can die and take out the Graphics card and what ever its connected to on the motherboard. JUst make sure not to get some old AF 2000's brand (or todays vintage) Chinese brands (My Corsair TX650 has been powering my compute for nearly 8 years now without issue)
You see, there is a green wire on the 24-pin connector, and if you short it to ground the PSU will function while it is grounded, you could just take a wire and connect a pin whose cable on the other side is black and connect it to the pin with the green on the other side and voilà, whenever you turn on the PSU it will automatically start, you don't even need that chip, just power on the second PSU after you start the system
Look up "drive bay PSU" -- brands like Thermaltake used to make supplementary PSUs that sat in a 5.25" bay. They were niche even back in 2007, though.
THANK YOU !!For not feeling it necessary to start all your vids " what's up / what is up guys"....your much more real
Recently did this with a friends PC. Was a prebuilt HP with a weird motherboard. Ended up using a 2nd PC, sandwiched the 2 together and ran the 6 pin from one PC to the other so the gtx 660 had power. Quite a funny way to run a PC.
This is exactly what I just did today. it's working so far but since I'm not super computer literate, only semi-literate, I came here to see if what I'm doing will cause any issues. so far my new tower is doing this weird thing where after the welcome screen when logging on, the screen stays black for like 5 minutes before the desktop shows up. so I'm not really sure what that's about.
@@EmmAPestilenciA Hard Disk Drive Or Solid State Drive?
(Search them both up and see which one you have.)
Did this for a while about ten years ago (with an AT PSU) with a dell oem setup to run a GPU as well as an extra HDD. even though the motherboard had 4 SATA ports the included PSU only had a single SATA power connector.
The only thing that board does is detecting voltage and give the secondary PSU the 'power on' signal.
For the primary PSU nothing has changed, if the PSU detects something bad it will shut off (read: no compromise). The secondary PSU is on a fixed ON state and will probably only switch off when the primary PSU also shuts down. So on the safety side the secondary PSU is possibly compromised. But this might also differ from PSU to PSU, contact your PSU manufacturer for the final answer on that one.
"I'm not really electronically clever" -RandomGaminginHD
and at the same time, "I don't recommend it the long term". Facepalm
That's a genius Idea mate! This is the best way I have seen so far, to turn both the PSU's on at the same time.
You can cut the green wire on the second psu and put a connector to connect it to the green wire on the first psu, it should power up exactly at the same time as the first power supply, reducing the load the first one have when powering up the computer until it gets 12v and the second psu turn on. You can cut the 2nd psu cables and connect them directly to the molex 6 or 8 pin adaptor.
You don't even need to do that just take a ground wire and attach it from the second PSU to the case and it will connect to ground together the case is because the PSU mounting connects the ground from the PSU to the connecting a ground wire from the 2 PSU to the case will do the same thing
Thanks for sharing bro, actually the only purpose of the tiny board is to GIVE MORE WATTS power to your 300 watts PSU making it more powerful, that's why it only has Capacitors and resistors on it. But if what you need is just to POWER your GPU, then directly plugging the 6 PINS to your GPU from the External PSU works just fine, and it won't harm anytime since computer PSU's are well regulated by themselves. But honestly, if my "PC Case" can fit a 700 Watts "used" PSU from EBay or Amazon that will only cost about $15 dollars (which they are) now, then that's the best option.
Umm no that's not how it works, adding a small circuit board isn't gonna magically make the psu, have more watts lol
@@mikeysgametime8914I didn't tried the tiny board trick. Instead, I use an additional external PSU from my other builds and use it exclusively to power my Graphics card, works like a charm. Now, I never run out of Power on my Graphics card, and never restart itself since then.
Can't you just plug the second one into the wall too and use that you power only the graphics card?
I once ran the DIY version of this. Manual toggle switch to jump start the Second PSU at about the same time as the first PSU. Works fine, and yes it is safe unless one of your PSU's is already a fire hazard.
just what i needed, THAAAANKS
Short green and black if you want to know. And connect black wires of both psu together to get common ground reference.
I mean phanteks not only has a psu splitter, but has a psu combiner. This would properly take the 24 pins of both psu's (and even both 8 pins if you want) and can not only act as a dual psu for things like extra graphics cards, but also acts as redundancy so if each psu is only connected to its load worth (my plans is to have a dual 1000w power supplies, have redundant power to my 1950x and then 2 vega 64's per psu) Don't tell me how crazy I am, as I use this for 3D animation and I can go for a bump over my current 5960x and 4 290x's.
Edit: these currently run on a 1600w psu from evga, I am not sure if I'm going to corsair or staying with evga, as if I can get corsair link working for both power supplies, then I'm going corsair
Seems Random Gaming HQ already watched Linus scrapyards wars with Austin Evans
A lot of high end editing computers have two psus in the computer so that encase one dies the other one powers up. it is pretty cool to have.
You can basically ignore the PSU recommendations of every GPU-manufacturer because they advice for the worst-case cheap china PSU`s.
A new entry level system with an RX560 and pentium for example draws barely 80W under gaming-load.
Even my System with a GTX 1070 + Xeon E3-1231v3 draws only around 310W from the wall while gaming (bf4).
Should i get a i5 4670 or a r3 1200? I actually have a fx 6350 but it's quite noisy and doesnt perform well
Dang you released this video as I was waiting on parts to do something like this too, but using a dell power brick so it's alot less messy. Great vid, man!
I love U! You are testing anything, that goes through the mind of a budget PC-builder. I thought of this last week XD
Bro… you had a windows XP or windows Vista sticker on that shotty 1995 case… are you serious? Lol
Lot of people don't realise that Delta also made the fans used in the super loud (even louder than normal) version of the Xbox 360
I used a paperclip once to short out the two pins and ran a gpu off of it a few months back and it worked like a champ
the things you do on this channel, i feel like ur the UK version of me here in the US minus the youtube channel tho. keep em coming man!
How *this* specific adapter board appears to work is it;
-Connects the APU to the system's ground rail
- Detects voltage from the PSU and turns on the APU
- The sequence of events that it operates by;
the primary psu turns on (as indicated by outputting voltage to more than just the standby); the adapter board receives power and uses that power to signal the APU to power on (this is achieved by connecting the 'green' soft-start wire on the APU to ground)
Acronyms used;
APU - Auxiliary Power Unit
PSU - (Primary) Power Supply Unit
Hey, could you help a little¿? i tried the same method as the video, but i don't have any adapter, i just jumpstarted secondary PSU(500w) my main one is 200w, im using the secondary PSU to power my GPU (RX 580) but whenever i turn on my PC using this configuration first start 500W PSU to powerup GPU and then 200W PSU to power up system thus giving power to the GPU through the 6 pin connector from the 500W PSU, my PC just restarts itself over and over and over again. ¿Do i need anything else to make it work? Besides the adapter which i don't have. I turn the PC with the GPU connected but not giving it power through the 6 pin connector from my secondary PSU(500w one) it starts just fine.
Basically the little module receives power and then sends a low volt signal on the "Power good" line of the 24-pin, like shorting a power button would.
its 100% save. you can start any psu by shorting the green and a black pin on the 24pin connector.
My dad once picked up a cheap GTX 480 in an auction, leaving his 470 unused. I grabbed it and jerry-rigged it into an eMachines with a Celeron 440. It ran Crysis somewhat happily, lol. A piece of wire linking the main PSU's green wire (next to the retention clip) as well as a ground wire to the other PSU enables it to turn on with the system.
You can actually do this even without that "thing". You just have to manually short the other PSU to turn it on.
For anyone curious, you can actually build this yourself. Not sure I'd recommend it, cause if you do it wrong, you can fry your psu. But I mean u can. Just use the molex connector to power a 12v relay, which then shorts PS_ON and GND on the other powersupply.
You can do this, but why would you want to? If you're getting a second psu, you'll be getting one with enough power anyway, so why not just use that?
if you want power vga with second psu, use server psu that only give 12v, alot of normal pc psu will have drop vol if load on 12v 5v 3.3v is not balance, good psu dont have this problem but you dont need second psu if you have good one. miner they use big psu or server psu to feed 12v to their gpus
Random its perfectly safe as it is just detecting the bridge that is made when the power switch is used there will be no internal spark so to speak, and is just really a sense instruction to power on.
There are miner dual PSU cables, which shares the "power sense" signal.
A pico PSU and a normal power brick wouldn't be too unreasonable for a situation such as this. Plus it wouldn't look too bad, especially in and SFF build.
can u review and test the Nvidia GeForce 256 plz, I was asking alot about it
King blood I'll look out for one :)
RandomGaminginHD can you pls recommend me a future proof bugdet GPU i have an i3 7100 8gb ram pls reply
There is no future proof budget cpu but I´d recommend a gtx 1050 or 1050ti for your processor
Kevi Shader for your processor?
I would get a 1050ti or a 1060 6gb for that system
Hey RandomGaming, Has the site that you once recommend Cex still ok to use? I have seen a lot of bad reviews of it online.
it is good and if it wasnt it wouldnt have shops practically evrywhere you go
I use to have run an oldschool 300watt that had its own wired in switch for secondary psu. Back when i first build a file server with 20 hds in it. It had two 300watt psu's. One was an older xt i belueve it was called. That one didnt power a motherboard. For me was only for added hd power, but would have worked for gpu as well.
They do make 12 pin to 24 pin adapters for Lenovos to use a modern higher powered PSU with a Lenovo motherboard. I use one myself. They work fine.
If you took the settings and resolution to higher levels, you will completely avoid stuttering. Try this one in your "Crappy CPU+Good GPU" combos :)
Baтц_26 🤣💪
my first gaming pc run with 3 psu's just fine
[x] doubt
why 3 though?
Why
@@beefyonyt idk maybe they had quad GTX 480 SLI and dual xeons all super overclocked? that or they combined 3 extremely bad PSU for a basic build.
@@virtualtools_3021 haha 250w psu go brrrr
That little PCB that fools the PSU into thinking it is connected to a motherboard is perfectly safe, assuming it was designed properly. As an electronics engineer, I can tell you that it is a simple matter if you want ensure that PCB is safe. All you've got to do is make sure the traces are a safe width for the max current (using good old Ohm's Law) and they are spaced apart for the voltages in play (the highest is 24 V between 12 V and -12 V I think, so not even that much). Nothing really too complicated.
I have been using it for awhile now, infact i started using it before i saw this video. It has been totally safe for me, I'm powering a r9 290 with it.
I have an r9 390x I need to power. Where can I buy this card?
I did this in a 90 quid pc (i3 530 + gtx 550) and just soldered both of the neutrals and grounds on the 24 pin side so they came on together.
I did this with ATI HD 3850 AGP, Intel Celeron 2.8Ghz Socket 478, 2x 1GB DDR1 and Windows XP. Both Power Supplies did last about 3 months, but at least my pc survive it. I had this pc (specs) from 2009-2011 and didn't have money for a better supply (only the GPU). After almost burn my pc, I did buy a better supply. After 2011 I upgrade to a Core i3 530, GTX 460 and Corsair 850w.
You don't really need that board. You can solder the 2 PSU switch wires together
Introducing the Dual PSU Computer, twice the power!
(not compute power, but electrical power) :P
Just stick a little wire between only one green wire and any black wire on 26pin connector, plug in your 6 pin/8 pin or even 2 in your GPU, turn on that power supply, then one in the PC, and start it up. That's how my cousin is using his HP with i5-2400 and r9 270x.
cool. Nice to see somebody testing theoretical problems and not just performance nonsense.
Hey @RandomGaminginHD, what is the name of the mini PCB on that video? I want to buy that for my Lenovo ThinkCentre M73 SFF.
they make cable splitters that connect the power on circuit of a second power supply to the board with the first. All that happens when you press the power button is it closes a circuit between two particular pins to tell your power supply to start supplying power, then comes the rest
3 years later and these are literally in every crypto mining rig.