Random resets after cpu+GPU upgrade (Arch) (lemmy.world)

submitted 2 months ago* (last edited 2 months ago) by Cort@lemmy.world to c/linuxquestions@lemmy.zip

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Upgraded to amd 5900xt & 7090xt and am experiencing random crashes. No overclock, no xmp/docp, no pbo (not defaults cause Asus has pbo on by default). 1000w seasonic PSU.

Whole screen goes green and reboots. Happens in heavy gaming, watching YouTube and even at idle.

Journalctl lists an mc5 hardware error suggests the cpu, but none of the troubleshooting has fixed it.

BIOS updated, c-states disabled, triple checked all settings, fully up to date Arch, but still randomly crashes.

Where do I go from here?

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[-] Cort@lemmy.world 2 points 2 months ago

Yep, that's the mobo. C states disabled as that was the advice given on arch forums. Apparently dialing c states is supposed to prevent the os from going into low power mode then crashing when voltage sags.

Cooler is noctua nhd15 with ptm7950, never been above 75c even in stress tests. Second fan on the cooler is as low as possible to blow over the vrm heat sync close to rear i/o.

Literally all of the advice for crashes says to disable xmp/docp. At the moment performance isn't the concern, it's the crashes

this post was submitted on 17 Jul 2026

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