Got my graphics card and....

I got my new graphics card the other day and tried it last night (raedon 7770hd ghz edition) and played games on it for about an hour and it suddenly white screened. I shutdown my pc and it still had a white screen with lines in it and tried it a few hours later and it worked fine for about 2-3 hours until white screening again.

Anyone know what is causing this?

 

Maybe it's overheating. Check your temperatures.

 

I suggest getting a temperature gadget on your desktop if you don't already have it.

Check your drivers, try reinstalling and making sure it's the correct one.

 

Check to make sure your fans are running full speed. Might need to update them even. They are notorious for overheating without the proper ventilation.

 

Sounds like a faulty video card, if it's not an overheating issue, or even if it is, i'd recommend RMAing it for a new one.