Undervolting 5800x3d with PBO2 tuner

[Koziolek]

My Ryzen 5800x3d runs very close to 90 deg so I am trying to undervolt it with PBO 2 tuner. It works pretty good, with -20 offset it gets 5-6 deg cooler in Cinebench

 

the problem is I have to put the values manually every time. I tried to add the offsets to target line in the shortcut at the end but it has no effect

 

"C:\Program Files (x86)\PBO2 Tuner for 5800X3D\PBO2 tuner.exe" -20 -20 -20 -20 -20 -20 -20 -20

 

the patch is correct because it opens the PBO but without offsets 

 

Anyone has any idea what  am I doing wrong?

[EightyDuce]

Can you not change the values in the UEFI/BIOS? 

[SCHiZO]

You can in fact change the values in BIOS. Also, i would run a longer test than Cinebench unless you are using the 30:00 minute stability test. 

Whenever i mess around with OC/UV i run Cinebench's 30:00 minute stability test while running MSI's Kombustor, which is a GPU stress test application very similar to Furmark. That way you get the most heat your PC can make and run a stable OC/UV once configured properly.

i did not manually enter the timings for each core. i eventually, after trial and error, did -15 on all cores for my 5800X.

[Lange_666]

2 hours ago, Koziolek said:

Anyone has any idea what  am I doing wrong?

Put your shortcut in the Windows Startup Folder.

[Koziolek]

1 hour ago, Lange_666 said:

Put your shortcut in the Windows Startup Folder.

. I have it in a startup folder , but the problem is the shortcut does not work as it should. it only opens PBO as in a right picture but is not changing values 

[Koziolek]

OK, solved, not the shortcut part - I still have no idea why it does not work but I lowered the PBO from Bios. Temps down so I am happy now

[Lange_666]

I think i can't do that from my BIOS. What is the setting called?

[Koziolek]

I finally did it from BIOS. It's called the same - PBO, I set it to -15

BTW: I have ASUS x570 TUF Gaming board

Edited April 30, 2023 by Koziolek

[Bazz_Mulder]

Command is wrong. 

You need to put whole string with values for limits too.

Here is example from my .bat file for CO -30 with limit values to make them default max:

"PBO2 tuner.exe" -30 -30 -30 -30 -30 -30 -30 -30 150 100 150 0

[Lange_666]

I don't have the values for limits in the string and it works.

+ Q: where do you get those limit values from and what does every value represent?

[Bazz_Mulder]

1 hour ago, Lange_666 said:

I don't have the values for limits in the string and it works.

+ Q: where do you get those limit values from and what does every value represent?

"Limits" tab in PBO2 tuner app:

These are default limits, PBO CO -30 settings in bios is also limiting EDC to 130A max

PBO2 Tuner will not allow to set higher limit then default (you can only make them lower), that's why I have 150 /100 /150 in my bat just to be sure to max them out.

Edited May 2, 2023 by Bazz_Mulder

[Thinder]

Just done that and ran both Cinebench and 3DMark Pro Firestrike at 4K 2 X MSAA.

I pushed it to -25 then reverted to -20 because I couldn't see any significant progress, and my GPU Temperature seems to be the limiting factor anyway.

I also lowered my GPU Maximum further voltage by 5mV, I don't know if it has much of an impact but I try to lower the overall system/case temperature in anyway I can.

I have very good air cooling with 5 X case fans and 1 GPU fan, one of the case fan blows upward from the bottom of the case and 3 of them are Noctua NF-A12Xx15PWM which can mount there and in front of the GPU where the 20mm wouldn't.

What I have noticed after setting the voltage to -20 is a slight improvement in performances in 3DMark Pro Firestrike at 4K 2 X MSAA, but not so much a lower temperature.

    Graphics score
    19 596 - 19 550

    Graphics test 1
    97.23 FPS - 96.97 FPS

    Graphics test 2
    75.82 FPS - 75.66 FPS

    Physics score
     28 975 - 27 993

     Physics test
      91.99 FPS - 88.87 FPS

     Combined score
      11 094 - 10 999

     Combined test
     51.60 FPS - 51.16 FPS

     3.12 FPS in Physics Test is not munch but I'll take it, it might show when playing DCS-MT in VR.

Edited May 26, 2023 by Thinder