Undervolting GPU

[VPII]

Look I've always been someone to try push my hardware to the limits, sometimes with Dry Ice and sometimes with LN2, but I've only done LN2 with a GPU once thanks to Vivi (or Goddy) and that was with a Nvidia GTX 280 after that it was mostly with my old Intel i7 5930K there after AMD Ryzen 2700, 3900X, 3950X and now 5950X. I never considered fine tuning the GPU much for everyday use, but after seeing some youtube clips regarding undervolting a GPU I thought I would give it a try. Now the GPU I am using right now is a Palit GeForce RTX 3080 Ti GameRock which I'm pretty happy about. I flashed the bios on the card to the Galax RTX 3080 Ti 1000watt bios which is way more than the 440watt I get with the stock bios, but it is easy to flash back with no proof that the card was even flashed with it. From the reviews I've seen that the card has 18 phases of power delivery to the GPU and 4 to the memory, but the 18 phases may only be 16 when looking at other reviews. Now following is what I found doing some testing, the highest one is somewhat of a fluke as the cpu is running PBO and the CPU result is usually in the high 16800 to 16900 range. But still it seems not to bad. I did not try lower than 0.950v for gpu as I figured wiht 0.950v working at 2040mhz it is still good.

Stock
3dmark Time Spy - 19954
GPU score - 20660
Highest Temp: 79C
Average Temp: 69C
Average core clock: 1927mhz

I scored 19 954 in Time Spy

AMD Ryzen 9 5950X, NVIDIA GeForce RTX 3080 Ti x 1, 32768 MB, 64-bit Windows 10}

www.3dmark.com

0.950v core and 2010mhz max core
3dmark Time Spy - 20238
GPU score - 21017
Highest temp: 70C
Average temp: 61C
Average core clock: 1983mhz

I scored 20 238 in Time Spy

AMD Ryzen 9 5950X, NVIDIA GeForce RTX 3080 Ti x 1, 32768 MB, 64-bit Windows 10}

www.3dmark.com

0.950v core and 2040mhz max core
3Dmark Time Spy - 20531
GPU score - 21297
Highest Temp: 69c
Average Temp: 61c
Average core clock:2034mhz

I scored 20 531 in Time Spy

AMD Ryzen 9 5950X, NVIDIA GeForce RTX 3080 Ti x 1, 32768 MB, 64-bit Windows 10}

www.3dmark.com

 

[VPII]

So I checked power consumption stock and it was 610watt yes it is the 1000watt bios but with my vcurve set to 0.95v max and 2040mhz core it dropped to 540 watt so a nice 70watt drop in power consumption

 

[Dr Evil]

Good to see you still doing your thing @VPII

 

[heinreich]

Undervolting is the new overclocking

 

[Valheru]

Undervolting is the new overclocking

+1

AMD cpu user here. PBO + undervolt guide from @VPII implemented on a 5950X and it runs great. 9 out of 16 cores boost over 5GHz, temps low 70s.

 

[VPII]

+1

AMD cpu user here. PBO + undervolt guide from @VPII implemented on a 5950X and it runs great. 9 out of 16 cores boost over 5GHz, temps low 70s.

Great glad it helped. Mine is sitting at low 60c full load but -0.1000 vcore offset with cb23 over 30k so I'm happy.

 

[Valheru]

Great glad it helped. Mine is sitting at low 60c full load but -0.1000 vcore offset with cb23 over 30k so I'm happy.

Wish I had more time to mess around. But please keep them coming, we do read and listen.

 

[VPII]

Wish I had more time to mess around. But please keep them coming, we do read and listen.

I'll always do, I like to share.

 

[RumMum]

I'll always do, I like to share.

Would you be able to give a bit more detail on how to go about undervolting specifically please? Afterburner?

 

[VPII]

Would you be able to give a bit more detail on how to go about undervolting specifically please? Afterburner?

Hello my friend. In all honesty I cannot explain in detail what keys to press as I'm without my usual computer working on an old Intel Q6600 with 3GB memory, don't laugh it is all my fault.

But yes, in after burner you basically drop your gpu speed by say 150 to 200mhz. Then you open the voltage frequency curve, select say on the voltage side 0.950v and set the gpu speed to say 2010mhz at 0.950v when you apply it, it would change the curve to be 2010mhz right through to the end. Now if you run this, say run the 3D Mark time spy extreme stress test and if it pass you start from the beginning drop to default drop GPU core by say 200mhz then got the voltage frequency curve and set the core speed at 0.950v to 2025mhz then if it pass do the same and test at 2040mhz and so on each time upping the gpu speed by 15mhz.

 

[AceSwiftShooter]

@RumMum
This is what I followed. should be somewhat the same for your card.

edit: no youtube links allowed?

just youtube the below:

The Ultimate GPU Undervolting Guide - Navi, Turing, Vega + More

 

[RumMum]

Hello my friend. In all honesty I cannot explain in detail what keys to press as I'm without my usual computer working on an old Intel Q6600 with 3GB memory, don't laugh it is all my fault.

But yes, in after burner you basically drop your gpu speed by say 150 to 200mhz. Then you open the voltage frequency curve, select say on the voltage side 0.950v and set the gpu speed to say 2010mhz at 0.950v when you apply it, it would change the curve to be 2010mhz right through to the end. Now if you run this, say run the 3D Mark time spy extreme stress test and if it pass you start from the beginning drop to default drop GPU core by say 200mhz then got the voltage frequency curve and set the core speed at 0.950v to 2025mhz then if it pass do the same and test at 2040mhz and so on each time upping the gpu speed by 15mhz.

Will try this over the weekend, thank you very much.

 

[VPII]

Will try this over the weekend, thank you very much.

Perfect, no problem. It really helps alot when you do it. The video that @AceSwiftShooter posted will give you a more in detil approach and give you clear indication of what to press when in Afterburner.

 

[WurminatorZA]

I've seen great results with my Vega56 I had when undervolting and overclocking. With my current 6700XT running 1.175v 2840Mhz Core, 2150Mhz Memory, 15% power limit increase. Pulls just over 200W and has a sustained boost around 2740-60Mhz with peaks to 2800Mhz all while staying below 58 degrees Celcius.

Not top 5 but top 10 for my system 3DMark.com search

Top 3 for Firestrike Ultra and Extreme with similar system specs. 3DMark.com search

3DMark.com search

3DMark.com search

www.3dmark.com

 

[dainluke]

How I generally like to do it is highlight all the points above your desired max voltage and floor them, and then I add maybe 60-90MHz (must be in 15MHz increments) at the highest voltage point. That way you won't have to worry about stability and thermal resistance at lower VID points and you still get all the performance during 3D applications.

For testing if personally recommend the TimeSpy, FireStrike and Port Royal looped stress test versions. You often successfully pass one or two runs just to crash at run 8 or 15 even. I would suggest the non-juiced versions of TS and FS because your card will generally run less stable when pushing more frames as your GPU will experience worse transients. Even after you've done TS and FS stress test, you should still test out all your heaviest games (CP-2077, Control, Warzons) and check for crashes late into gaming sessions.

You can do your memory OC before or after tbh, the memory OC will often limit your core OC so it might be best to max out memory first. Some NVIDIA GPU cores can run games way up at ludicrous boost points relative to the architecture, but I've tested A LOT of cards and mainly in 3DMark as I don't mine. Very rarely will a card be rocksolid at more than 90MHz on the offset when its power limit is reached and temp is good. The key is that GPU boost will take the card as high on the VID as the power and temp allows it to. All the offset does is determine the extent to which you're OCing it above what it thinks the average card is capable of. Thus adding 90 on your 0.95V point should already be quite quick.