Hi all,
I have a big stability problem on my Archlinux system, I’m not doing anything that requires a lot of resources and the computer for no apparent reason stops the power suddenly (it’s like plugging in and re-plugging the power plug) and it started since I changed my 5700 XT to a 6800 XT.
At first I thought that the problem was related to my “EVGA SuperNova G3 - 750W - 80PLUS Gold” I changed it against a “Corsair HX 1000W” but the problem persists.
But with Windows 10 I do not encounter this problem it is surprisingly stable, even if I pass GPU passthrough and it is stable I can make long series of hours of games but when I stop the VM the sudden stops start again .
I tested a live Manjaro and the problem is also present.
My setup:
CPU - AMD Ryzen 9 3900X
Motherboard - GIGABYTE X570 AORUS MASTER AM4
AIO - CORSAIR Hydro Series, H150i PRO
Memory - G.Skill Trident Z 32 GB DDR4-3600 F4-3600C16D-32GTZNC
NVMe - Samsung 970 EVO 500 GB (Windows 10 Pro)
NVMe - Crucial P2 2TB
SSD - Sandisk Digital SSD PLUS 480GB sata (Arch Linux)
HDD -Hitachi 320 GB 7200rpm 16MB sata
HDD - Seagate 500 GB 200rpm 32MB sata
HDD - Maxtor 500 GB 16MB sata
GPU host - GALAX GeForce GTX 1060 OC 3GB
GPU guest -Sapphire Radeon RX 6800 XT Nitro + SE (on a riser)
PSU - Corsair HX 1000 1000W - 80 PLUS Platinum
Case - Thermaltake Suppressor F51 Tempered Glass Edition
I don’t know what to do about this issue 
Thank you for your help because no matter how much I look, I can’t find a solution 
PS: sorry for my bad english