Question PC restarts when GPU is under load (game or youtube video with 1080+)

[user2352]

My PC started restarting automatically recently when GPU is under load.
Hardware was not changed at all.
It was working for 3-4 years without such issues on the same exact hardware:

CPU - HexaCore Intel Core i5-8400, 3900 MHz (39 x 100)
GPU - Asus PCI-Ex GeForce GTX 1060 Dual 6GB GDDR5 (192bit) (1569/8008) (DVI, 2 x HDMI, 2 x DisplayPort) (DUAL-GTX1060-O6G)
Motherboard- Asus Prime H310M-K (2 PCI-E x1, 1 PCI-E x16, 2 DDR4 DIMM, Audio, Video, Gigabit LAN)
MEMORY (two sticks):
DIMM1: Kingston Fury KF3200C16D4/16GX 16 GB DDR4-3000 DDR4 SDRAM (18-19-19-36 @ 1501 MHz)
DIMM3: Kingston Fury KF3200C16D4/16GX 16 GB DDR4-3000 DDR4 SDRAM (18-19-19-36 @ 1501 MHz)
PUS: GameMax GM-500W

Windows 11 Event Viewer has the following system events:

Error - The previous system shutdown at 11:30:38 PM on ‎6/‎13/‎2023 was unexpected.
The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.

I can reproduce it easily using FurMark. During last test it shutdown when GPU reached 73 °C.

So can't even figure it out what's wrong, if it is about PSU (but it's the same one, wasn't changed) or GPU (temperature or something else)

 

[Barty1884]

Doesn't appear to be temperature related on the GPU at 73'C - for one, the shut down event wouldn't be "unexpected" in the log, as the GPU/CPU should throttle first.

The immediate thought, is that PSU. Is it thing... thing?

32A on the 12V rail.... 384W in theory, total, on a good day - when it was new. Add 4-5 years use to it.

Struggling to find too much info on it, but one mention of a 'warranty' at 12 MONTHS - likely tells you the confidence the manufacturer had in this unit, when it was new:

https://www.gamemax.uk/index.php/products/psus/gm500-500w-80-plus-bronze-modular-power-supply/#:~:text=Warranty%20%E2%80%93%20The%20GameMax%20GM%20PSU%20range%20comes%20with%2012%20Months%20Warranty.

 

[user2352]

The immediate thought, is that PSU. Is it thing... thing?

Something similar but I guess my one is older, It's just the same name and there are many similar models of this manufacture.
So yeah, I think it's also PSU. Will try to replace.
Thanks

 

[Dark Lord of Tech]

I agree , most likely the power supply.