My game crashes upon startup (ATI HD4870x2)

coolboy9987

Prominent
Dec 26, 2017
7
0
510
When i start Rocket League or CS:GO my monitor just turns off and then i cant use the computer anymore. It just started occuring yesterday. Sometimes it even shows a black screen with white lines and playing fuzzy sound. I also noticed that when I scroll down or just something in aplearence of the screen the video card scrambles correspondly.
My specs:
Motherboard: P5Q DELUXE
CPU: Intel Core 2 Quad Q9650 @3.00GHz (4cores)
RAM: Corsair DOMINATOR 6Gb (2x2Gb + 2x1Gb)
PSU: Chieftec APS-1000c (1000W)