Asus Gtx 660 stops working in game, black screen when start computer

[tjug17]

So i have an asus gtx660 oc, 16gb ram, msi z77a mobo.
I was playing my cs when suddenly it crashes, i thought it is a normal "nvidia display has stopped working and has recovered" which never happens in game only before
But few min later it crashes totally screen went black
I tried restarting computer and checking bios but nothing helped,
It asks for boot device when i start my computer up sometimes idk why
Now i cannot even start up the computer to uninstall driver or anything.
Any help will be appreciated

 

[AimOnly Him]

i think your GPU is damaged... try to remove your GPU and plug your VGA cable to motherboard, and then reboot your PC...