Question Computer makes a buzzing sound and restarts after launching a Steam game ?

[TonyG4]

Hello everyone,
here are my Specs:

Motherboard: MSI MPG B550 Gaming Plus
CPU: AMD Ryzen 5 5600X
PSU: be quiet! Pure Power 11 700W
GPU: NVIDIA GeForce GTX 980Ti
RAM: Crucial Pro RAM 32GB Kit (2x16GB) DDR4 3200MHz
Case: Phanteks Eclipse p400s
OS: Windows 11

So this problem started a month ago. I wanted to play Lethal Company (a Steam game) with some friends and the computer just shut down completely (as if i cut the electricity) and would not turn back on. After 1 minute i could push the power button to turn it back on and everything seemed normal until i opened that game again. After opening the game the same happened.
I switched from windows 10 to windows 11 and erased all data from my SSD.

The thing is that i can still play every other game without any problems.
I updated every possible driver and even the BIOS itself but nothing changed. I bought a new PSU and then the PC began restarting instead of shutting down after opening the game.
I have no overheating issues.

I even sent the motherboard back to MSI and they sent it back and told me that there is no problem with it.
I can run Battlefield V without and problem but somehow even if i open the stupidest Steam game this happens: i hear a buzzing sound from the pc (i am not able to determine from where exactly) and then it restarts. I havent found any single problem and i have zero idea at what would cause this.

Please enlighten me.
https://www.notebookcheck.com/NVIDIA-GeForce-GTX-980-Ti-Benchmarks-und-Specs.165854.0.html

 

[Fix_that_Glitch]

Try using just one stick of ram at a time then open the steam game/s. Then repeat with the other stick of ram to rule out a memory problem.

 

[TonyG4]

Thanks for your reply, i tried your recommendation, but sadly the Problem persisted.

I believe i have found the Problem. I did a GPU Stress test using FurMark and everything Was going finde until i clicked on removing the furry circle that is in the middle, then the buzzing Sound appeared and the PC restarted. So i believe it is indeed the gpu. It is 9 years old so it makes sense that it is starting to give up.