PC restarting while playing games

Ranger_137

Prominent
Jun 15, 2017
3
0
510
So basically what happens is that while playing various games my PC decides to freeze for a second, have a bzz noise in headset and then restart. But only once. After that restart everything seems to work perfectly fine, and no more restarts after that. I've cleaned the PC case, tested temperatures of all hardware, even scanned with Malwarebytes and it should be all fine. Any ideeas?
 

Ranger_137

Prominent
Jun 15, 2017
3
0
510


Intel i5-4460, 8GB DDR3, 1TB HDD, GTX 960 STRIX DirectCU 4GB GDDR5
+ added a 240gb SSD on which I have windows
PSU: Corsair vs550 Model 75-001836