My screen keeps going black?

TERMINAL333

Honorable
Dec 23, 2013
11
0
10,510
I just got a new nVidia graphics card. I installed it, installed the drivers and everything worked fine, untill recently my screen started randomly going black. It's just for a second as if it is readjusting and i do notice a slight change in the quality. Every time it happends i can also hear the windows USB plugged in sound.
Can you tell me the cause of this and how can i fix it?
 

TERMINAL333

Honorable
Dec 23, 2013
11
0
10,510

Took out the card, dusted and cleaned the PC checked all the plugs and nothing changed.
 

TERMINAL333

Honorable
Dec 23, 2013
11
0
10,510


Here are my specs:
MoBo: AsRock G31M-gs
CPU: Intel Pentium Dual-Core 2.5ghz
GPU: nVidi GeForce GT 610
RAM: 4GB
PSU: 420W

 

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