With the "traditional yt-media" aka HUB, GN etc. you wouldn't even be past the sponsor anouncement . And then they have to stretch the content like crazy without getting much info across. Go TechPowerUp!
@@squisherderheld I thought HUB and GN are still okay, their content tend to be long because they do put in their own pov on what they think of the product. But you get clickbaits like Graphically Challenged, Gamer Meld, Dan does PC, UFD Tech, those ones are the real fking yappers.
My 9700X will boot with 6400, but when testing with Memtest86+ it fails pretty quickly. So I’m not sure if it’s better (I doubt it even) and would encourage everyone to thoroughly test their memory when fiddling with it, because being able to boot doesn’t mean all is fine.
@@kasimirdenhertog3516 first of all memtest86 is a terrible stress test. Whats your kit to begin with? If your kit can’t run 6400, no amount of SOC voltage will solve it.
@@PowellCat745 you may have an opinion about Memtest86+, but there's a very basic thing about tests: if it fails, it ain't good. And it's a 7600 kit, I even can run it at 8200 so 6400 should be a piece of cake.
The memory timings being all over the place does not make this a 1:1 test between any single instance, especially the 5600 with massively loose timings compared to 6000 (CL especially). I get it's extremely difficult to find a memory kit capable of the same timings at higher speeds, but still, this variance does impact results, quite significantly in some cases.
This video fails to mention infinity fabric, there is a noticeable dip in latency when running FCLK at exactly 2/3 UCLK so that would be 2133 @ 3200 UCLK or 6400 MT/s (2133 is about where AMD FCLK tops out at which is why you never see anyone going for 7200-8000 etc.) Edit: I saw in a comment that you guys did your tests @2100, try bumping to 2133 @ 6400 and you should get your best results by far
@@kastrat0r Yes 2066 would be it, one thing to keep in mind is that 2133 is a faster frequency in general so at a certain point it becomes better to to just run a higher frequency rather than the 2/3 ratio. Particularly at like 3000 UCLK (6000 MT/s) 2133 would still be faster even though 2000 FCLK has the advantage of being synced
@@read6281Thats why a little fine tuning with 8,000mhz ram would out do the sync'd 6,000/6,200/6,400mhz Ram. You can see it on some test the 8,000 needs more bandwidth through the infinity fabric speed since its not in sync. The bandwidth need out weighs the latency hit at that point.
Literally the video I wanted. I randomly saw there was an Agesa update that improved 7000MHz+ stability and was worried because I bought some (comparatively) slow 6000MHz memory last year for $60 because it was the sweet spot.
0:06 "Fast" is a very unsharp word. Fast in terms of clock rate, or in FP32 performance? Anyway, depending on the definition, there are several models that are "faster"
my cpu is 7800x3d with a 4090 and i have x2 16gb DDR5-6000 CL36 kit that is running at 4800 CL36 (from factory). if set it to 6000 and enable "memory context restore " for faster boot times, i will have too pay attention to my thermals, power consumption and other things or it dosent matter at all?
When running my Kingston memory kit at EXPO-6400MT/s CL32, or at EXPO-6000MT/s CL30 with my Ryzen 9 9950X, MemTest86 would display errors, so I had to drop the frequency at 5800MT/s while keeping the EXPO-6000 timings (CL30-36-36-80, 1.4V) in order to have a 100% stable system. I guess, there's a reason why AMD only supports, officially, DDR5-5600...
I wonder if CU-DIMMs will be able to hit 12000+ in a year or two and max out the controller again at 1:2? That might be a nice bump, if memory bandwidth is the weak link with the 7 and 9000 series.
There's nothing on the roadmap and AMD has not leaked any information about any chipset supporting CUDIMM. X870 can't do it. I.e. MSI X870E can use CUDIMMs only in Clock Driver Bypass mode. If you aren't using the clock driver you won't be able to support any of the higher CUDIMM frequencies. So the wait may be longer than you're hoping as AMD is lagging behind with memory support for desktop. You'll have to wait for Zen 6 and a new IOD, as Zen 5 used the older MMC.
@@zyxyuv1650 That stinks. Looks like you're right. When people started saying they were supporting it, I didn't think that only meant they had a work around.. Definitely going to get the best DDR5 6400 I can, when I get my 9800X3D
Great video. Usually you don't see such accurate, useful, and empirically backed up information about such a complex topic in such a short and concise video.
Planning to buy Zen 5 soon - have run a Zen 3 system since launch, I recall RAM capacity affecting the speed with Zen 3 - IIRC, if you ran 64 GB, slower speeds needed to be used. If I"m planning to run 64GB on Zen 5, should I aim for slightly slower than DDR6000/CL(lowest possible) or is that not an issue any longer?
So is the ram number they referring actuall mega transfers (MT/s) so the both clocks (infinity fabric) should be the same or ram doubled? Am I getting that right?
I have been with my 7800X3D and it's worked flawlessly. Currently afaik the limitations are the CPUs themselves not the motherboards, which also keep getting updates over time. So if Ryzen 9000 doesn't handle it much better, the gen after should.
my experience with ram : i had 12900k with ddr6200 cl34, upgraded to 14900k with ddr6400 cl32 and after upgrading again to 7800x3d i didnt change the ram and i had problems due to xmp. i bought ddr6000 cl30 expo and now its fine.
you can actually calculate a lot of that before hand by plotting some values and formulas into diagrams eg Gear 1 also nown as 1:1 is actually 2:3:3 while gear2 is 2:3:6 you need to calculate your ram timings latency and the those timings which come into play when writing to the ram need to be multiplied by 1000/FLCK eg Kit GB/s CL tRCD tRP tRAS 1000/FCLK 1/FLCK*tRAS FCLK DDR5-8200 CL38-49-49-84 65.6 9.27 11.95 11.95 20.49 0.73 14.98742127 1367 DDR5-6000 CL30-36-36-76 48.0 10.00 12.00 12.00 25.33 0.50 12.66666667 2000 DDR5-6000 CL28-36-36-96 48.0 9.33 12.00 12.00 32.00 0.50 16 2000 since in gear2 it can still read every clock cycle from the dimm CL/FWL on reads is un effected but for writes and every subtiming that comes into play when we write to RAM we can estimate the latency of that pretty accuratly. in some sense its a bit like RAID 10 with 4 Drives (in terms of improvements and penalties). These considerations especially come into play when you want Memory configs other than 32GB cause DDR5-6000 CL28 is only in 2x16GB available while DDR5-6000 CL30-36-36-76 is in 16,24 and 32GB DIMM's available. DDR5-8200 CL38-49-49-84 -> SO far I've seen only 2 or 3 Kits here in Europe at that speed and thight timings that operate at only 1.4V which are all 24GB Dimm's
It's very misleading (actually strictly speaking incorrect) to say AMD officially supports DDR5-6000. The highest officially supported (guaranteed to work) speed is DDR5-5600. 6000 almost always works (1:1), but is not supported.
@@insertnamehere4419 I don't see how it's irrelevant. There should be a distinction between what AMD supports and what works; explicitly saying it's "officially supported" when it's actually explicitly *not* officially supported isn't great.
@@exscape This has been how it works for a long time. Were you using 2666 memory with AM4 just because it said thats the official support limit? You're doing it wrong.
@@insertnamehere4419 I never said anything of the sort. I said the video's claim that DDR5-6000 is officially supported is wrong, nothing about what does I use, nor what I recommend. And yes, I'm using faster RAM than is officially supported (and recommend DDR5-6000 CL30 for most people on AM5).
5600 is supported in 4 DIMM configuration. You can always run faster in a 2 DIMM configuration. And no, 6000CL30 EXPO doesn't "almost always" work. It always works. And AMD sends 6000CL30 kits with boxed processors to reviewers. They would look pretty damn stupid if that didn't work.
but, what are the other cpus running when it comes to memory settings? I got rid of all mine more expensive lga1700 cpus because the 12700k with 7200c34 at 7800c36 is just as fast, even my 7800x3d with 7800x3d is not my prime mp/fps system because of that and it relegated to race sims and youtube while I game on they 12700k.
AES Encryption is accelerated with higher bandwidth so technically 8000 is still better 🙂 But in all honesty its not worth the money for the average user, but for a power user depending on what programs were tested, I'm not sure what techpowerup used for every single setting and test but my tests show up to 25% performance increase if latency is balanced between the optimum frequencies ie. 6400 and 8000. but some applications and even games can also have a negative hit so it depends on the owners use case. For example, a single PC streaming setup using cpu rendering, I seen a performance boost up to 10% for 1% lows in games if the ccd's are split with process lasso with the Game & OBS, since bandwidth is increased overall thorouput is also inscreased. So my conclusion is if you have the money and need the bandwidth do 8000, but if not, then you just don't waste your time. It is very hard to optimized and tighten the timings with Ryzen at 8000 to the point I deemed it not really worth it lol. Cheers all.
I have a launch day 7950X from back when, I have been running it 6400c32/2133(1:1) pretty much from the start. SOC at 1.24V, VDDP 1.0V, it's super stable. Wouldn't expect less from a new CPU, but I'm waiting for the 9950X3D now with more or less confirmed dual 3D Vcache.
Hello, what do the voltages for the 6400MHz and 8000MHz profiles look like? For example, if the 8000 (1:2) required significantly lower voltage than the 6400 (1:1), wouldn't it be more efficient, especially if the performance difference between them is only 0.1%?
www.techpowerup.com/review/ddr5-memory-performance-scaling-with-amd-zen-5/20.html There isn't a lot of difference between any of them, though 6400 vs 8000 they are pretty much tied.
AMD always benefits most from low latency, has been that way since Zen 1. Nothing new. Obviously it also doesn't do as well in "Gear 2" because it's essentially raising lots of latency for a little bit more speed.
@@ThaexakaMavro Can you overclock 5600Mhz kits to 6000? Or does your kit need to be made specifically to run that, just asking. Because I'm upgrading to a 9950x soon, and got a CL46 5600mhz kit.
@@ReallySadProfessoryou have to manually overclock it and stress test it , also which memory chip the kit has is the determining factor, Hynix memory is the best available and has the highest chance of clocking to 6000 (since the default spec of your kit is 5600 means is a low binned hynix or is another brand), if it is Samsung or Crucial memory they max 6000, kind of, but with horrible timings, and most of the DDR5 performance comes out of the timings, that's why for high speed kits or overclocking you want nothing else than Hynix.
@@ThaexakaMavro Ok I got two completely diffy answers and contexts....I do believe Crucial makes quality RAM so even with bad timings, I should be able to push some voltage into it and force 6000. It runs 1.1V native anyways. thanks for the answer
I'm sorry, but 1 percentage point increase is not "decent". Unless you know that CPU you buy will do 6400 in 1:1 without a lot of voltage there is no point in shelling out the extra cash for the memory.
If you check the article you'll see the 7800x3D there. Was too high on the chart in the gaming test to show and too low in the application 😉 You can also see it in our 9950X review video. th-cam.com/video/T2NW0Ljfi34/w-d-xo.html
Its best to buy very fast ram, for example lexar ares 7200cl34 and clock it down to 6000cl28. And then because its a good bin, most of them can go up to 6000cl26 if you bump the voltage to 1.4 from 1.35
@@DesoloVirhigh capacity and high speed have a inverse correlation, for high speeds you want 2 sticks only, 4 sticks is too much stress for the memory controller, for high capacity (>96gb) you need 4 sticks, so you have to choose high capacity or high speed, you can't have both.
This vid is entirely misleading. It's showing the result of a test of a single Ryzen 9 9950X, not a representation of the Zen 5 architecture in any way whatsoever. Zen 5 cpu's react wildly different to memory speeds from model to model. For example the Ryzen 7 7800X3D show almost no benefit from faster RAM in gaming, whereas the Ryzen 7 9700X show a dramatic performence-improvement using faster RAM. Further your sample-size is 1, making no reference to tests conducted by others to underpin your results in any way, making your results themselves untrustworthy even within your chosen scope. Further, not disclosing these basic facts means the viewer can put no stock in your overclocking skill nor your methodology. Lastly, a benchmark showing %-performance?! Do you even know what "performance" constitutes? Even should the results you do have prove representative for the 9950X line, they would still be completely meaningless showing an arbitrary number based on a meager and random selection of games.
I like how techpowerup gets straight to the point.
Yes indeed it resumes very well the great article on the website.
With the "traditional yt-media" aka HUB, GN etc. you wouldn't even be past the sponsor anouncement . And then they have to stretch the content like crazy without getting much info across. Go TechPowerUp!
@@squisherderheld I thought HUB and GN are still okay, their content tend to be long because they do put in their own pov on what they think of the product. But you get clickbaits like Graphically Challenged, Gamer Meld, Dan does PC, UFD Tech, those ones are the real fking yappers.
Went straight into the video and didn’t even asked me to subscribe, so I’m subbing.
Maybe THAT'S why we have so few subscribers... 😁
Ahhh there's a techpowerup channel. Subscribed !
I wish all tech videos could be more like Tech PowerUp. Thanks folks.
Never knew you guys had a TH-cam channel, subbed!
perfect, thx! scaling,performance,latency optimazation got complex, so any guidance is much appreciated
Never thought you guys had a channel
1:30 6400 is very doable on Ryzen 9000 now due to IOD improvement. Recent batches of Ryzen 7000 can also run 6400 with low SOC voltages.
Ryzen 9000 didn't change IOD at all, it is the exact same chip from 7000
@@jcgongavoe337 as process matures silicon quality improves. That’s why I said newer Ryzen 7000s would also benefit. Learn to read bro.
My 9700X will boot with 6400, but when testing with Memtest86+ it fails pretty quickly. So I’m not sure if it’s better (I doubt it even) and would encourage everyone to thoroughly test their memory when fiddling with it, because being able to boot doesn’t mean all is fine.
@@kasimirdenhertog3516 first of all memtest86 is a terrible stress test. Whats your kit to begin with? If your kit can’t run 6400, no amount of SOC voltage will solve it.
@@PowellCat745 you may have an opinion about Memtest86+, but there's a very basic thing about tests: if it fails, it ain't good. And it's a 7600 kit, I even can run it at 8200 so 6400 should be a piece of cake.
For my 9700X I have a DDR5-6000 CL30 kit that is running at 6200 CL30 with slightly increased voltages, it seems really good. Thumbs up!
Great video exactly what I needed
The memory timings being all over the place does not make this a 1:1 test between any single instance, especially the 5600 with massively loose timings compared to 6000 (CL especially).
I get it's extremely difficult to find a memory kit capable of the same timings at higher speeds, but still, this variance does impact results, quite significantly in some cases.
This video fails to mention infinity fabric, there is a noticeable dip in latency when running FCLK at exactly 2/3 UCLK so that would be 2133 @ 3200 UCLK or 6400 MT/s (2133 is about where AMD FCLK tops out at which is why you never see anyone going for 7200-8000 etc.)
Edit: I saw in a comment that you guys did your tests @2100, try bumping to 2133 @ 6400 and you should get your best results by far
So whats best for 3100 UCLK (6200MT)? 2066 FCLK, right?
@@kastrat0r Yes 2066 would be it, one thing to keep in mind is that 2133 is a faster frequency in general so at a certain point it becomes better to to just run a higher frequency rather than the 2/3 ratio. Particularly at like 3000 UCLK (6000 MT/s) 2133 would still be faster even though 2000 FCLK has the advantage of being synced
@@read6281Thats why a little fine tuning with 8,000mhz ram would out do the sync'd 6,000/6,200/6,400mhz Ram.
You can see it on some test the 8,000 needs more bandwidth through the infinity fabric speed since its not in sync. The bandwidth need out weighs the latency hit at that point.
Straight to the point. Thanks.
looking forward to similar ram testing videos for upcoming intel cpus ❤
Literally the video I wanted. I randomly saw there was an Agesa update that improved 7000MHz+ stability and was worried because I bought some (comparatively) slow 6000MHz memory last year for $60 because it was the sweet spot.
0:06 "Fast" is a very unsharp word. Fast in terms of clock rate, or in FP32 performance? Anyway, depending on the definition, there are several models that are "faster"
does the igpu get boost above 6400? does cpu only ai workloads run better above 6400? please answer my build is hanging on this
Does this apply to a 4 stick kit?
my cpu is 7800x3d with a 4090 and i have x2 16gb DDR5-6000 CL36 kit that is running at 4800 CL36 (from factory). if set it to 6000 and enable "memory context restore " for faster boot times, i will have too pay attention to my thermals, power consumption and other things or it dosent matter at all?
how about FCLK speed at 6400 ?
Are you blind ?
FCLK was set to "Auto", which resulted in 2100 MHz for all these tests. This is close to the limit of the CPU, 2200 MHz is not possible
@@TechPowerUp meaning
2,000mhz be average
2,100mhz a better than average
2,133mhz lucky bin
2,2000mhz GOLDEN FIND!
@@kevinerbs2778most can run 2167mhz without issues.
@@TechPowerUpfor 6000 and 8000 you should run FCLK 2000MHz. For 6400 you should run 2133MHz to minimize latency.
When running my Kingston memory kit at EXPO-6400MT/s CL32, or at EXPO-6000MT/s CL30 with my Ryzen 9 9950X, MemTest86 would display errors, so I had to drop the frequency at 5800MT/s while keeping the EXPO-6000 timings (CL30-36-36-80, 1.4V) in order to have a 100% stable system.
I guess, there's a reason why AMD only supports, officially, DDR5-5600...
If ddr5 6000 cl32 shows 2990 in 1 memory othervis 3000 then what it shows or ...?
Brevity FTW. Thank you! 👍🏼
I wonder if CU-DIMMs will be able to hit 12000+ in a year or two and max out the controller again at 1:2? That might be a nice bump, if memory bandwidth is the weak link with the 7 and 9000 series.
There's nothing on the roadmap and AMD has not leaked any information about any chipset supporting CUDIMM. X870 can't do it. I.e. MSI X870E can use CUDIMMs only in Clock Driver Bypass mode. If you aren't using the clock driver you won't be able to support any of the higher CUDIMM frequencies. So the wait may be longer than you're hoping as AMD is lagging behind with memory support for desktop. You'll have to wait for Zen 6 and a new IOD, as Zen 5 used the older MMC.
@@zyxyuv1650 That stinks. Looks like you're right. When people started saying they were supporting it, I didn't think that only meant they had a work around.. Definitely going to get the best DDR5 6400 I can, when I get my 9800X3D
What about 6200 with tight timings.
did u try fclk 2000 uclk 2000 and mclk 4000, memspeed 8000 mts? so fclk = uclk ?
Will 6000 also be the sweet spot for the X3D variants?
Good thing that G.Skill just released it's DDR5-6400 CL30 kits, it'll be perfect for a Ryzen 7 9800X3D and RTX 5090 build
Perfect for parts that aren't out yet with no testing done on them, yep.
Is it safe to say that the
KLEVV Bolt V 32GB (2x16GB) DDR5 Gaming RAM 6400MT/s CL32 Memory Module Kit are the best ?!
No? Literally never heard of "Klevv"
@@insertnamehere4419 Then do some research on Google.
most detailed ddr5 scaling I have ever seen. Thank you
Now with anandtech gone, all rests on techpowerup shoulders
Great video. Usually you don't see such accurate, useful, and empirically backed up information about such a complex topic in such a short and concise video.
on your guys website you have the wrong dimensions for the asus strix 1080, you guys have the pcb dimensions but not thr cooler dimensions
Will it be the same with the upcoming x3d cpus?
>faster=slower
literally 1984
can u do a followup test of extreme timings can u get 6400 to 26 timing with 1.6 v and some heatsink + fan
Planning to buy Zen 5 soon - have run a Zen 3 system since launch, I recall RAM capacity affecting the speed with Zen 3 - IIRC, if you ran 64 GB, slower speeds needed to be used. If I"m planning to run 64GB on Zen 5, should I aim for slightly slower than DDR6000/CL(lowest possible) or is that not an issue any longer?
So is the ram number they referring actuall mega transfers (MT/s) so the both clocks (infinity fabric) should be the same or ram doubled? Am I getting that right?
Memory controller clock and memory clock should match. Infinity fabric is different, running at ~2100 in our tests.
I've been using DDR5 6400 CL32 for awhile and everyone said I didn't know what I was doing... 👍
I have been with my 7800X3D and it's worked flawlessly. Currently afaik the limitations are the CPUs themselves not the motherboards, which also keep getting updates over time. So if Ryzen 9000 doesn't handle it much better, the gen after should.
The problem is that if you can't run it at 1:1 with your CPU then 6400-32 is slower than 6000-30, not all CPUs can run 6400 at 1:1
@Weroleytor True. I can run 1:1 & when I made the purchase, that was the highest speed that would work.
What is your capacity? Soon I'm going to buy 64GB ram for my 9800X3D and can't decide between 6000MHz CL30 and 6400Mhz CL32.
@@solodagcisame question 😅
my experience with ram :
i had 12900k with ddr6200 cl34, upgraded to 14900k with ddr6400 cl32 and after upgrading again to 7800x3d i didnt change the ram and i had problems due to xmp. i bought ddr6000 cl30 expo and now its fine.
On ddr5 6400 You have mclk 3200 but uclk 2133 only, not 3200
you can actually calculate a lot of that before hand by plotting some values and formulas into diagrams
eg Gear 1 also nown as 1:1 is actually 2:3:3
while gear2 is 2:3:6
you need to calculate your ram timings latency and the those timings which come into play when writing to the ram need to be multiplied by 1000/FLCK eg
Kit GB/s CL tRCD tRP tRAS 1000/FCLK 1/FLCK*tRAS FCLK
DDR5-8200 CL38-49-49-84 65.6 9.27 11.95 11.95 20.49 0.73 14.98742127 1367
DDR5-6000 CL30-36-36-76 48.0 10.00 12.00 12.00 25.33 0.50 12.66666667 2000
DDR5-6000 CL28-36-36-96 48.0 9.33 12.00 12.00 32.00 0.50 16 2000
since in gear2 it can still read every clock cycle from the dimm CL/FWL on reads is un effected but for writes and every subtiming that comes into play when we write to RAM we can estimate the latency of that pretty accuratly.
in some sense its a bit like RAID 10 with 4 Drives (in terms of improvements and penalties).
These considerations especially come into play when you want Memory configs other than 32GB cause DDR5-6000 CL28 is only in 2x16GB available
while DDR5-6000 CL30-36-36-76 is in 16,24 and 32GB DIMM's available.
DDR5-8200 CL38-49-49-84 -> SO far I've seen only 2 or 3 Kits here in Europe at that speed and thight timings that operate at only 1.4V which are all 24GB Dimm's
It's very misleading (actually strictly speaking incorrect) to say AMD officially supports DDR5-6000. The highest officially supported (guaranteed to work) speed is DDR5-5600. 6000 almost always works (1:1), but is not supported.
Irrelevent. 6000 will work.
@@insertnamehere4419 I don't see how it's irrelevant. There should be a distinction between what AMD supports and what works; explicitly saying it's "officially supported" when it's actually explicitly *not* officially supported isn't great.
@@exscape This has been how it works for a long time. Were you using 2666 memory with AM4 just because it said thats the official support limit? You're doing it wrong.
@@insertnamehere4419 I never said anything of the sort. I said the video's claim that DDR5-6000 is officially supported is wrong, nothing about what does I use, nor what I recommend. And yes, I'm using faster RAM than is officially supported (and recommend DDR5-6000 CL30 for most people on AM5).
5600 is supported in 4 DIMM configuration. You can always run faster in a 2 DIMM configuration. And no, 6000CL30 EXPO doesn't "almost always" work. It always works. And AMD sends 6000CL30 kits with boxed processors to reviewers. They would look pretty damn stupid if that didn't work.
but, what are the other cpus running when it comes to memory settings? I got rid of all mine more expensive lga1700 cpus because the 12700k with 7200c34 at 7800c36 is just as fast, even my 7800x3d with 7800x3d is not my prime mp/fps system because of that and it relegated to race sims and youtube while I game on they 12700k.
For DDR5 all systems are tested with DDR5-6000 36-36-36-76
Upgraded from 32gb 6000mhz cl36 to 64gb 6600mhz cl32 & noticed a difference.
The outdated memory controller and I/O at 6nm is holding Zen 5 back
I read the complete article, but the video resume beatifully , thanks for the work.
take a 4090 for 720p gaming its like take a formula one for test into bottleneck trafic.
excellent well done
I like this video format! Keep it up. The written site is already a go to for me.
AES Encryption is accelerated with higher bandwidth so technically 8000 is still better 🙂 But in all honesty its not worth the money for the average user, but for a power user depending on what programs were tested, I'm not sure what techpowerup used for every single setting and test but my tests show up to 25% performance increase if latency is balanced between the optimum frequencies ie. 6400 and 8000. but some applications and even games can also have a negative hit so it depends on the owners use case. For example, a single PC streaming setup using cpu rendering, I seen a performance boost up to 10% for 1% lows in games if the ccd's are split with process lasso with the Game & OBS, since bandwidth is increased overall thorouput is also inscreased. So my conclusion is if you have the money and need the bandwidth do 8000, but if not, then you just don't waste your time. It is very hard to optimized and tighten the timings with Ryzen at 8000 to the point I deemed it not really worth it lol. Cheers all.
great work and coverage
DDR4 was so clear to me with the timings and cas latency but with ddr5 I dont have that
Same thing, basically
i have 2x32GB 6400MHz CL 32 downcloaked to 6000MHz CL 30
Noise to know! 😂. I'm running a teamforce delta 6000MT/s kit at 6400. Aayeee liiike it aah lottt! 😂
I have a launch day 7950X from back when, I have been running it 6400c32/2133(1:1) pretty much from the start. SOC at 1.24V, VDDP 1.0V, it's super stable. Wouldn't expect less from a new CPU, but I'm waiting for the 9950X3D now with more or less confirmed dual 3D Vcache.
Just what i needed 10x sub +1
Great video, not wasting time, clear and effective. No sensationalism just info, thanks!
Hello, what do the voltages for the 6400MHz and 8000MHz profiles look like?
For example, if the 8000 (1:2) required significantly lower voltage than the 6400 (1:1), wouldn't it be more efficient, especially if the performance difference between them is only 0.1%?
www.techpowerup.com/review/ddr5-memory-performance-scaling-with-amd-zen-5/20.html There isn't a lot of difference between any of them, though 6400 vs 8000 they are pretty much tied.
Maybe someday a manufacturer manages to create DDR5 12000MT memory lol
DDR5 5600 mts is price/performance, DDR5 6000 mts is the sweet spot.
Ddr5 5600 could be overclocked to 6000...
In gaming their is also single and doul rank differences as well as with timing.
I don't like the background music when someone is talking to us. What's the native for DDR4 ?
AMD always benefits most from low latency, has been that way since Zen 1. Nothing new. Obviously it also doesn't do as well in "Gear 2" because it's essentially raising lots of latency for a little bit more speed.
informative - perfect , thanks
I want to go 6300MT/S
Do you ask me to subscribe? I know now everything. 6000mhz is the best for this CPU. Subbed!
Wow, somebody discovered, that IF clock is the bottleneck, who'd thought about that, ever since Zen 3? Surely nobody.
This is a separate clock than the fabric speed.
@@TechPowerUp a verification of uncoupled vs coupled affecting performance would be appropriate.
I don't get it why this channel doesn't get many views/subs their content is good and straight to the point
Is it possible to "futureproof" RAM for upcoming CPU's
No, you don't have a guarantee on the speeds supported or could run higher speeds than what you bought.
6400 is sweet spot on 9000cpu(many youtubers use 6000mhz)
barely any gains vs 6000mhz so no the sweet spot is still 6000
@@ThaexakaMavro Can you overclock 5600Mhz kits to 6000? Or does your kit need to be made specifically to run that, just asking.
Because I'm upgrading to a 9950x soon, and got a CL46 5600mhz kit.
@@ReallySadProfessoryou have to manually overclock it and stress test it , also which memory chip the kit has is the determining factor, Hynix memory is the best available and has the highest chance of clocking to 6000 (since the default spec of your kit is 5600 means is a low binned hynix or is another brand), if it is Samsung or Crucial memory they max 6000, kind of, but with horrible timings, and most of the DDR5 performance comes out of the timings, that's why for high speed kits or overclocking you want nothing else than Hynix.
@@ReallySadProfessor yes most 5600mhz kit will overclock to 6000mhz quite easily .
@@ThaexakaMavro Ok I got two completely diffy answers and contexts....I do believe Crucial makes quality RAM so even with bad timings, I should be able to push some voltage into it and force 6000. It runs 1.1V native anyways. thanks for the answer
I'm sorry, but 1 percentage point increase is not "decent". Unless you know that CPU you buy will do 6400 in 1:1 without a lot of voltage there is no point in shelling out the extra cash for the memory.
I run 64gb of 5600Mt/s cl34 pretty happy with the middle ground memory size / speed
All we need is DDR5 12000 lol
At that point it will be called DDR6 🤔
8k mt's only work best with Intel..
So best is stick 6000mhz
My favorite benchmark charts and website for all tech reviews now has a youtube channel? Sign me up!
Grabbed 6000mhz for better compatibility, don't really care about RAM speed, but quantity ? Yes.
I have my 7800x3d ans my 64 gb memory kit set yo 6400 MT/S cl32 on 1:1 ratio 😊
What is your motherboard?
@@solodagci I have it running in 2 gigabyte x670e the Aorus master and the Aorus pro X
And the best gaming cpu 7800x3d is left out... Is this to make intel look better? :D
If you check the article you'll see the 7800x3D there. Was too high on the chart in the gaming test to show and too low in the application 😉 You can also see it in our 9950X review video. th-cam.com/video/T2NW0Ljfi34/w-d-xo.html
@@TechPowerUp thx
Make sure you get Hynix a die ….l
Its best to buy very fast ram, for example lexar ares 7200cl34 and clock it down to 6000cl28. And then because its a good bin, most of them can go up to 6000cl26 if you bump the voltage to 1.4 from 1.35
@@inqizzo *It's
@@DesoloVirhigh capacity and high speed have a inverse correlation, for high speeds you want 2 sticks only, 4 sticks is too much stress for the memory controller, for high capacity (>96gb) you need 4 sticks, so you have to choose high capacity or high speed, you can't have both.
@@DesoloVir 2 x 48gb = 96gb, read my comment
But this is only gaming . Productivity workloads will benefit from greater memory bandwidth
Productivity is the last part of the video.
This could be a half an hour video on other tech channels lol
LoL my ryzen 9 9950x runs perfect CL32 6400
CooL
K? That doesnt refute the point in the video.
So does theirs, what's your point kiddo
This vid is entirely misleading. It's showing the result of a test of a single Ryzen 9 9950X, not a representation of the Zen 5 architecture in any way whatsoever. Zen 5 cpu's react wildly different to memory speeds from model to model. For example the Ryzen 7 7800X3D show almost no benefit from faster RAM in gaming, whereas the Ryzen 7 9700X show a dramatic performence-improvement using faster RAM. Further your sample-size is 1, making no reference to tests conducted by others to underpin your results in any way, making your results themselves untrustworthy even within your chosen scope. Further, not disclosing these basic facts means the viewer can put no stock in your overclocking skill nor your methodology. Lastly, a benchmark showing %-performance?! Do you even know what "performance" constitutes? Even should the results you do have prove representative for the 9950X line, they would still be completely meaningless showing an arbitrary number based on a meager and random selection of games.
What was the point of this video? Seriously. You explained timings. But didn't show results. Or anything. This was a useless video.
Just get a 6GT/s CL28-30-30-66-104 if you can.