Question Computer random restarts - Help!

[Ytal]

Hi,

My computer restarts in random times, both when idle or at work. Happens more under stress tests but not always and not only. Also happens when idle at night and under very low stress

Specs:
Motherboard MSI X99s SLI PLUS
CPU i7-5820k
Amd gpu
32GB ram
Win10 pro

Mouse, keyboard, 2 screens

I tried formatting the disks, reinstalled windows from scratch, updated all drivers, updated bios, ran ram test. All seems good, nothing fixed the issue.

After the unexpected restart (which looks just like momentary power loss) the computer gets stuck with black screen and will not start till I unplug it and long press the power button.

Sometimes the blue led in the back of the motherboard lights up, which has something to do with bios / cmos i think.
The computer is connected to a pdu so no power loss can happen.

This phenomenon started around 6 months ago.

Any ideas??

Thx

 

[Fix_that_Glitch]

Have you tracked the cpu temps perhaps it is overheating? What gpu card and what psu on board?