Black screen, fans 100%? Potential fix!?
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Posted Jan 26, 2023, 3:55 AM UTC
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We've seen a lot of reports about this issue
That is called the GPU "crashing", so yes, it will have a lot of reports...? Been a known issue for a few decades.
If this was from anyone but cablemod, i would assume this is a joke post. Or is there some specific new cause of crashing that we should know about?
By the description, this is just standard voltage-related crashing due to shifting VRM states or voltage droop in general, usually due to shitty PSUs.
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Yeah, this was something we found that fixes the issue that isn't cable related though, which is why we wanted to share it. :)
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..What exact issue, though? Kind of feels like some key details are missing here.
Driver-related instability vs power-related instability are usually two utterly unrelated issues with many permutations, unless you mean driver or firmware control over VRM switching and the like causing issues?
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There were a lot of people suspecting cables to be faulty, but after doing some testing and troubleshooting, it does look like a driver was causing the issue. Issue being the fans ramping to 100% and screen going black. There could be something else still, but so far, a few people that we've done this testing with have said that this fixed the issue for them.
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I was able to fix this issue in my configuration adjusting some bios settings.
"In BIOS under Advanced -> Platform Misc Configuration there are multiple settings for PCI Express power-management, I disabled the main PCI Express Native Power Management as well as the "PCI Express Clock Gating" for "SA - PCI Express" (from what I have found this is a power-saving feature where it skips clock-cycles, this can cause instability for some devices). Later on I also disabled the other PCI Express power management settings: DMI ASPM, DMI Gen3 ASPM, PEG - ASPM, just to be sure."
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While the support is appreciated, all this does is force the card to use the P0 power state, and won’t actually fix why people’s cards are crashing at lower power states. It’s either defective silicon, or an issue with power delivery (bad cable, bad power sags on the 12V rail of the PSU, VRMs on the board, etc.), and users should get to the bottom of that instead of needlessly increasing power consumption. This is unlikely to be a software issue.
Yeah, this is something we found to stop the issue that isn't cable related. It's been happening for some people regardless of the cable used.
How low of a power state are we talking here? Lowest I've tried is 50% on 4090FE without issue.