Help me my PC keeps crashing when im playing games (blackscreen)!

Twinkieman32

Reputable
Jan 17, 2016
10
0
4,510
So the other day I wanted to try overclocking my PC, after I did that my PC went really slow and kept crashing, I set the settings to factory mode + I had my CPU(s) unparked so I parked them and then I restarted my PC, after the restart was done, I launched CS:GO and played it for 5-10 minutes, my screen went black, grey and black stripes were over my screen, it only crashes when I play games like CS:GO, Battlefield 3 etc.
My PC specs: https://gyazo.com/4f8f7ce42b116d196f3c9495d4a42e89
Help would be appreciated! Thank you!
Im thinking of buying a new graphics card: Radeon HD 7950 3GB Gigabyte would that help? or is my motherboard damaged?
Im new and i dont really know anything!
 

Twinkieman32

Reputable
Jan 17, 2016
10
0
4,510

My PSU Is Thermal master 500W,120mm, PPFC and i did put the graphics card back to original settings
 

Twinkieman32

Reputable
Jan 17, 2016
10
0
4,510

I upgraded from windows 7 to windows 10, and now it doesnt go black/blue screen, but i have this low FPS after GPU driver update problem and i cant find any help! I tried installing old drivers but still nothing