PC Shuts off under load.

IEatedASoup · September 2, 2023

Recently, my PC has started shutting off when under load. It doesn't blue screen, it just shuts off along with all of my peripherals. Nothing else loses power, and the PC is not plugged into a surge protector. I've checked my temps and they seem normal (Around 40 degrees when idle, and around 70-75 when under load). I've also tried using a different PSU and it hasn't fixed it either.

Specs:

Mobo: MSI B450 GAMING PLUS MAX

CPU: AMD Ryzen 5 3600

GPU: XFX AMD Radeon RX5700 XT

RAM: 16Gb ddr4 Corsair Vengance LPX dual channel

PSU: Thermaltake 700W psu

SSD: Sandisk 1Tb sata

Case: NZXT H510

IEatedASoup · September 2, 2023

9 hours ago, Inver_ShaRingan said:

What Temps are you referring to ? The CPU or GPU ? Try to install the HWinfo64 and monitoring your all temps, like VRM (power section on your motherboard), GPU, CPU, Storages.

After you PC shut down itself again, when you back into Desktop, Press Win+R and type eventvwr and look at the latest showed error in your logs, it will more likely tells you what was the reason or at least give you a clue. It can be a bit Black Magic for the first time, but is useful and worth to know about it.

After checking Event Viewer, the only significant error that pops up just says "The previous system shutdown at 9:23:11 PM on ‎9/‎1/‎2023 was unexpected.", which doesn't help me much. When I go to the time specified in the error, there are no logs. the last log before the shut off was at 9:17, and it was just a random information log. And the logs after the shutdown are just regular bootup logs. So I dont think that I will get anything useful out of event viewer.

As for Hwinfo64, It looks like my VRM temps stay at about 36 degrees when idle, my cpu stays at about 40 degrees when idle and my gpu stays at about 45-50 degrees, I really dont think temps are the Issue as that was my first Idea and I spent a long time cleaning my pc and reapplying thermal paste and verifying that all my fans are in working order (they are).

This leads me to believe it could be some sort of firmware thing? maybe a bios setting or something like that, but ive tried turing off a lot of the bios settings that have reported crashes like C-states, and that didn't work either.

IEatedASoup · September 3, 2023

21 hours ago, Inver_ShaRingan said:

About that part, you said the Shutting down is happening under load, but you just mentioned "Idle" which actually doesn't matter as long as it not high when idle.

Download Aida64 run stress test with all hardware it will stress your all components at the same time, and while stressing it look at the temps using HWInfo64, Aida has also temps readings build in, but HWinfo64 is more relevant.

Then if you won't notice anything over 90C (except Hot spot on your GPU if you have AMD, don't remember if Nvidia is showing that temps yet), and PC will turn off again while stress testing then, you know for sure it's not temps issues.

About bios, if you didn't have made any Manual OC on your CPU or rams or whatever, then as far as I know there is no way to make that happen. But I would suggest to reset the BIOS before stress testing, to assure that all is on stock settings.

Ok, I ran the stress test you said, and the temps did get pretty hot (CPU was peaking at 95-100C while gpu stayed at abou 80C), which I would have expected to turn off my pc but didn't. When playing games, the cpu usually stayed at about 75-80, which I do think is pretty high, and games like Fortnite would crash at about 85 degrees, but would play fine at 75-85 for a few minutes before crashing. Do you think this is an overheating issue, and if so what cooling should I look into?