PC Restarts randomly?

Exor Madness

Reputable
Jun 24, 2014
2
0
4,510
I have a build and its new one..
CPU: AMD A10 5800K @ 3,8 GHz
RAM: 4GB-1600MHz
Mobo: ECS A55F2-M3
GPU: Radeon 7660D

The problem:
when i start it, i logged in to windows and after 2-3 minutes it restarted the screen(black screen)the computer still on though.. but it restarted like we have to chooze the safe mode and normally?

>The thermal paste is already in it.. its brand new
>There is a CPU cooler (heatsink) and an additional fan in the psu and the casing they work nicely
>there isnt any dust in it.. its a new casing bought from the store
>>>when it restarted, there is no blue screen like something.. it restarted randomly with black screen and no signal.