- Apr 17, 2023
- 2
- 1
- 15
Note: This is a solved problem that was really cursed to troubleshoot, so I'm posting a solution in case anyone else encounters the same problem.
I built a new PC with the following components:
- Ryzen 7 5700X
- Radeon 6700
- Fractal Design Ridge Mini ITX case (you'll see why this is relevant shortly)
and experienced a very strange issue where even at idle, the GPU usage of the Windows system process would continue spiking repeatedly, causing/related to immense display and input lag and frame dropping on a build that shouldn't be having that issue. I switched to my linux partition and still experienced the issue, confirming that it's not a software issue. (The system GPU usage spiking is probably a symptom rather than the problem) This problem was intermittent but followed little discernible pattern.
Watching "dmesg -Hw" for some time while the problem was occurring eventually showed the following error:
(I mention the above only as a diagnostic step towards identifying whether your issue is the same as mine.)
Other forum threads mention people fixing this issue by re-seating their graphics card. Re-seating my graphics card didn't fix the problem, but a dodgy graphics card connection was still the issue. It turns out that the Fractal Design Ridge Mini ITX case comes with a PCIe 3.0 riser for the 16x slot, which causes issues with some configurations when run in PCIe 4.0 mode. Fractal Design made an official statement about it here.
TL;DR: If the riser causes you trouble, you can manually set the PCIe slot to 3.0 mode in your BIOS as a stopgap measure until you can contact their support and receive a replacement 4.0 compatible riser.
I built a new PC with the following components:
- Ryzen 7 5700X
- Radeon 6700
- Fractal Design Ridge Mini ITX case (you'll see why this is relevant shortly)
and experienced a very strange issue where even at idle, the GPU usage of the Windows system process would continue spiking repeatedly, causing/related to immense display and input lag and frame dropping on a build that shouldn't be having that issue. I switched to my linux partition and still experienced the issue, confirming that it's not a software issue. (The system GPU usage spiking is probably a symptom rather than the problem) This problem was intermittent but followed little discernible pattern.
Watching "dmesg -Hw" for some time while the problem was occurring eventually showed the following error:
Code:
[drm:dc_dmub_srv_wait_idle [amdgpu]] *ERROR* Error waiting for DMUB idle: status=3(I mention the above only as a diagnostic step towards identifying whether your issue is the same as mine.)
Other forum threads mention people fixing this issue by re-seating their graphics card. Re-seating my graphics card didn't fix the problem, but a dodgy graphics card connection was still the issue. It turns out that the Fractal Design Ridge Mini ITX case comes with a PCIe 3.0 riser for the 16x slot, which causes issues with some configurations when run in PCIe 4.0 mode. Fractal Design made an official statement about it here.
TL;DR: If the riser causes you trouble, you can manually set the PCIe slot to 3.0 mode in your BIOS as a stopgap measure until you can contact their support and receive a replacement 4.0 compatible riser.
Facebook
Twitter
Instagram