PC fully shuts down. Is it PSU or Graphics card??
Computer Type: Desktop
GPU: Gigabyte Radeon RX 6800 XT Gaming OC 16GB
CPU: AMD Ryzen 5 7500F
Motherboard: ASRock A620M Pro RS WiFi
RAM: 32GB (2×16GB) DDR5 6000MHz CL30 (EXPO enabled)
PSU: Cooler Master MWE Gold V2 750W 80+ Gold
Operating System & Version: Windows 11
Description of Original Problem:
My PC will randomly completely shut off while gaming. It is not a crash or blue screen — the entire system instantly loses power as if the plug was pulled, then it boots back up normally.
This does NOT happen on desktop or during normal use.
It mainly happens in games such as:
No Man’s Sky VR
Forza Horizon
High on Life
It is very inconsistent. Sometimes it can happen within minutes, sometimes not at all.
I built this PC myself last year and it has been running great at 1440p with no issues until recently when this started happening more often.
Troubleshooting:
CPU and GPU temperatures are normal
GPU hotspot temperatures are normal
AMD GPU stress test passes (10 minutes stable)
Event Viewer only shows Kernel-Power Event ID 41 after shutdown
Tried reducing GPU power limit (-6%)
Tried slight GPU undervolt
Using two separate PCIe power cables (not daisy chained)
Reseated all power cables
Stress tests do NOT reproduce the issue, only gaming does
I also purchased the PSU from Amazon and initially considered returning it under warranty, but they said it must be inspected first. I’m worried it may pass basic testing because the issue only happens under specific gaming loads and not synthetic stress tests.
From everything I’ve tested, it seems like a power delivery issue under gaming load, possibly related to GPU transient power spikes or PSU behaviour.
I think it might be due to the power spikes?? I’m not 100% sure or is it some fault PSU that needs returning??