BSOD a video card problem?

[brfitzp1337]

Yesterday my video card was OC'd at what it says in my sig, except i had the memory at 1040, and the fans were keepign it nice and cool it was around 40c, then out of no where it crashes, screen scrambles, music starts stuttering then a blue screen followed by a reboot. So pc comes back on i reset all CPU oc to default speeds, then do the same for my gpu when i get windows on again. Same thing happens like 45 min later. Turn the PC on, and before i can even check the windows logs to see what kind of error im getting, it happens AGAIN. after that it worked all night, windows has no error log of the problem, I've ran numerous virus scans with AVG, have zone alarm pro, ran adware, and spybot, ccleaner, and like after using it for like 4 hours today it did the same thing.

Does the screen scrambling mean it has anythign to do with my GPU?
help, i've tried everything i can think of.