How to turn on an ATX PSU outside case without motherboard

In this video I show you how to turn on a standard ATX PSU without it being connected to a motherboard.
Music: "Legacy of None" by Harris Heller from Streambeats.com (Copyright Free)

[@orewaluffy6555]

You can also turn on your pc case without motherboard using this trick

[@erictownsend8711]

what if the power supply doesnt have a on/off switch and connecting the green and black wire does nothing? thanks in advance.

[@x_CrossHair_x]

All good ..But.. how is it ?? That the Power Switch on the PC Cabinet is "Momentary Contact". What pins ?? Or, how is the Momentary Switch ON / OFF Power Achieved ??

[@d3luxy]

Thanks! I bought a new PSU for my old RX570 that I had since my old PC broke. My lenovo prebuilt that I recently got can't handle a GPU sooo I'm using this as a alternate way till I get my 24 pin to 14 pin adapter since I don't wanna make it manually lol

[@JulienNOURRY-of9zi]

what kind of witchcraft is that ^^

[@razzelsantisima6593]

Does it work in my thermaltake smart series 600watts rgb??

[@crismaniactalledo9717]

it worked, ty so much now i can use any 12v or 5v accessories on my psu❤

[@zakaryatouahri7]

@@crismaniactalledo9717 it is safe ?

[@AJLaSaracina]

Thanks for the video. I used it tonight to power on a PSU to power a GPU since mine apparently isn’t antiquated to run. In your opinion is it ok to run a power supply into a GPU via this method for about a week?

[@BartechTV]

It should be fine. I used a PSU powered on using this method for almost 2 years to power an eGPU with no issues.

[@karan3771]

I have old Atx PSU. I got the PSU running by this method but when I connected the sata hdd, it did not spin. what is the solution?

[@Cat_loaf20]

The Psu mat be bat

[@andreasksasse]

I tried this once, it exploded!
I think it was a Dell specific PSU that happened to have different wiring though..

[@BartechTV]

Dell PSU's don't follow the ATX wiring standard. You probably shorted +5v to ground instead of PS_ON#

[@VictorsVoice1]

😆...😆... I needed a belly laugh and I got one after reading your post. I'm about to attempt something similar myself. I hope I don't end up sending you smoke signals.

[@AshishPatel-yq4xc]

Very useful. Thankyou

[@kamar_kp]

All psu are the same? I have a deepcool pk450d... i don't have the motherboard yet...

[@BartechTV]

All ATX PSU’s work like this. It’s a standard.

[@alafrosty]

This works so long as your PSU is dumb enough. I apparently have a PSU that detects load on the CPU connector and won't turn on using this method. I came here to see if I could figure out how to circumvent the problem.

[@BartechTV]

I've never heard of a PSU that does that. It's outside ATX specification. the spec states that "When PS_​ON# is pulled to TTL low, the power supply should turn on the four main DC output rails"
New motherboards allow BIOS updates without a CPU installed, how are people going to do this is the PSU won't even turn on?

[@alafrosty]

@@BartechTV I managed to get mine working again by plugging it into a motherboard. I think that it must have gone into windows sleep mode and wouldn't come out until it got back to a PC motherboard. At least, that's my theory. Once it started up connected to a MoBo, it jump-starts just fine.

[@Yosuru]

@@BartechTV It's real, old ATX PSUs require a minimum load on a certain voltage rail (usually the one with the most power) for it to regulate voltage properly.
Without this, some ATX power supplies will outright refuse to turn on or output lower than rated voltage on all voltage rails.
Some PSUs even require minimum load on more than 1 voltage rail.

[@shivamvidrohi]

@@Yosuru how old

[@Yosuru]

@@shivamvidrohi More than 10 year old PSUs at this point maybe, not sure but roughly that.