Powercolor HD Radeon 7970 GLITCHING :(

So I haven't tried re-seating the cooler but for some reason my GPU keeps making horizontal lines on my computer screen.  Then after a while, everything goes purple... how can I fix this? Nothing on my board looks burnt or broken?


Thanks guys. 


Could be your monitor. Have you tried it on a different one?


Are you on DIV, HDMI, or VGA?


dvi with a dvi to vga adapter