Re: test video card to see if its bad?
Could be artifacting due to dying PSU? But for the most part, I'd agree with Rohan. Run it through various programs/test and post the results here so we can determine if it's normal.
Is your a standard clock version, SC, SSC? Have you ever overclocked it?
RD-PC -//- i7 950 // Evga x58 SLI // 3x2 OCZ PC3-12800 // 2x Evga GTX470 // Corsair HX850 // SilverStone TJ07