PC randomly rebooting

Adrian_112

Prominent
May 31, 2017
4
0
510
As stated in the title, my PC is experiencing random reboots of system.
The problem started happening few months ago but I didn't bother as much, and since reboots started to get more frequent I bought a new PSU because I thought I might have less power than needed. As I am writing this, reboots are still happening, so new PSU obviously haven't solved anything. Overheating doesen't seem to be a problem, I checked the temps, CPU isn't getting over 60, and GPU isn't getting over 80 degrees.

Reboot is happening mostly when I am playing Overwatch, sometimes after 10,20,30 minutes and sometimes it can take hour or more to reboot. It's also happening while im writing documents in Word and browsing the web simoultaneously.

The steps I already tried to do are:
- swapping different GPU
- completely reinstalling windows 10
- removed all other usb devices and kept only mouse and keyboard
- checked the temp

My configuration:

CPU - AMD - FX-8120 3.1GHz 8-Core Processor
GPU - XFX - Radeon HD 7850 2GB Video Card
Motherboard - Gigabyte - GA-990XA-UD3 ATX AM3+ Motherboard
RAM - Kingston - 8GB (1 x 8GB) DDR3-1333 Memory
SSD - Kingston - HyperX Fury 120GB 2.5" Solid State Drive
HDD - Western Digital - Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive
PSU - MODECOM Volcano 650, ATX v2.31 (650W)

Any help would be higly appriciated!
 

Adrian_112

Prominent
May 31, 2017
4
0
510


Just checked both RAM and HDD. No errors..
 

Adrian_112

Prominent
May 31, 2017
4
0
510


It shuts down by itself, just black screen, and then instantly boots windows again.
 

Adrian_112

Prominent
May 31, 2017
4
0
510


I was constatly checking them while gaming, but I have also done some benchmarks, stress tests etc. and they were not high and stable