this post was submitted on 22 Jan 2024
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AMD GPU overclocking (lemm.ee)
submitted 10 months ago by MoreCoffee@lemm.ee to c/linux_gaming@lemmy.ml
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I've been messing around with overclocking my 7900xt on linux to see if I can use the same settings as I do on windows. Unfortunately, it doesn't seem nearly as stable on linux. For some reason adjusting the memory clock by about any amount causes a lot of screen flickering. Has anyone had much success overclocking their AMD gpu with the same settings as on windows? I'm running wayland, kernel 6.7.1 with a drm patch fo fix setting power level. Using LACT to do the overclock.

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[–] vikingtons@lemmy.world 1 points 10 months ago* (last edited 10 months ago) (1 children)

How far are you able to take mclk in Fedora without any voltage offset?

Does 1020 mV pass Vulkan memory test in Windows?

[–] MoreCoffee@lemm.ee 2 points 10 months ago (1 children)

Basically no increase with default voltage either. If I bump mclk +10 it starts to flicker. Set it back to 1250 and no more flickering. I will have to test that on windows when I get some time.

[–] vikingtons@lemmy.world 1 points 10 months ago (1 children)

huh, interesting. is the flickering like an intermittent white flash?

Also - sounds good.

[–] MoreCoffee@lemm.ee 1 points 10 months ago (1 children)

I just tested memtest_vulkan on linux, everything default but set Mclk to 1300, and it passed. But, there was still some flickering, not non-stop, but every once in a while I would get a flicker.

[–] vikingtons@lemmy.world 1 points 10 months ago (1 children)

Is this with a single display? Do you think you could capture a video of this flicker?

[–] MoreCoffee@lemm.ee 2 points 10 months ago* (last edited 10 months ago)

I've got 3 displays. I just noticed something interesting; if I apply my settings in LACT I notice some flicker, if I then logout of my gnome session and relogin it seems fine, no flickering yet. I'll do some more testing.