Question Undervolting issues linked to Windows 11 or the BIOS ?

discospanic

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Jul 12, 2018
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So I’ve got a problem with something not obvious to me and really don’t have the experience to understand what to look for.

Issue:

I’ve been trying to undervolt my GPU and have had zero success so far. Almost anything from stock frequencies to lower will eventually crash on something. This is especially bizarre to me since I’ve been through about 7 different 30 series gpus over the past year all will eventually prove to be unstable therefore I don’t see silicon lottery as a factor here. Currently I have an EVGA RTX 3090 FTW3 and I’m down to 1790MHz at 875mv crashing at times. I’ve spent hours adjusting these curves at various frequencies and voltages with no luck.

What’s annoying about all this is my partners win 10 rig has had 3 various 30 series cards and they all undervolted perfectly. Currently has a TUF 3080 1860MHz at 875mv with no issues and this was the same previously. All that had to be done was set the undervolt, run superposition, play some games and possibly small adjustments to make if required.

My system just overall isn’t as stable as my partners even at stock and I refused to see this as a win 10 vs 11 issue! xD

Possible causes:

I have undervolted my CPU also but this appears to be running fine since at stock gpu setting I have rarely had crashes. I have tightened my DDR5 ram timings to 36/36/72 since that was one of the memory profiles provided for my Gskill ram kit. (Sticks are cl40 at stock) Maybe this is the issue however extensive OCCT and prime 95 testing was done for both of the above and found no issues…

I also had to change various TPM settings etc to get valorant to work on Win 11 and just followed some of the bios guides which potentially messed something else up.

Specs:

My rig:
I7 12700k
Z690 aorus master
RTX 3090
32GB Gskill DDR5 6000mhz CL40

Partner:
5800x
B550m-k prime
32GB Corsair 3200MHz( yeah I know AMD 3600 blah blah blah)
RTX 3080
 
you cant compare 3080 and 3090 with frequency at some voltage...3090 has way more GPU cores (about 1500 more) which needs more voltage to run stable...
same voltage on 3090 vs 3080 would result in much lower gpu clock than on 3080
same frequency on 3090 vs 3080 wouild result in much higher voltage than on 3080

thats same as picking up 8core cpu and tryin undervolt it to 6core version and wondering why its not stable
 

discospanic

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Jul 12, 2018
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you cant compare 3080 and 3090 with frequency at some voltage...3090 has way more GPU cores (about 1500 more) which needs more voltage to run stable...
same voltage on 3090 vs 3080 would result in much lower gpu clock than on 3080
same frequency on 3090 vs 3080 wouild result in much higher voltage than on 3080

thats same as picking up 8core cpu and tryin undervolt it to 6core version and wondering why its not stable
I would absolutely agree with you however I don’t think it’s the undervolt itself. For one I have tested a 3080 strix on my system that couldn’t run stable at 1815mhz 850mv but when plugged in to the other could do a lot higher. Seems I have no baseline on my system unless I want to lose a ton of performance.
 
I would absolutely agree with you however I don’t think it’s the undervolt itself. For one I have tested a 3080 strix on my system that couldn’t run stable at 1815mhz 850mv but when plugged in to the other could do a lot higher. Seems I have no baseline on my system unless I want to lose a ton of performance.
gpu temperatures were same on both systems?
pcie bus speed was same on both systems?
 

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