Is my video card dead?

[BanDeodorant]

I was playing a game when suddenly, everything froze (couldn't alt tab or move mouse or anything) and purple lines appeared on some parts of the screen. When I restarted my computer, the bios screen had a lot of blurry white lines. It also had some blue lines during the windows loading screen, but after that I can't reach the desktop, as there's no signal to the monitor after that. I've resorted to using my integrated graphics as backup and it worked fine. Does this mean my 6600gt is dead? =[

 

[Nenu]

See if its getting too hot.
Clean any dust from the heatsink.
Keep the case side off to see if lower case temps will help.

You can also try unplugging it, clean the contacts and any dust from the slot and then put it back.

 

[BanDeodorant]

The screws on the hsf are very small, and none of my small screwdrivers work, so what kind of screw driver should I use in this case?

Or should I just try to blow the dust with compressed air?

 

[kevdog]

use compressed air, but take it outside...(especially if you're married)