Damaged 8800gt?

[pooptacular]

I bought my Asus 8800gt from newegg about 2 weeks ago and for the last 5 days it has been nothing but problems. What happens is when I load certain games like Crysis or Assasins creed I get corruption for around 5 seconds or so and then I get a bsod with the "page in non paged area" error. I checked my ram with memtest so it's not that. I also used a program called videomemorytester that checks your v-ram and it passed that ok.

The thing is certain games run perfectly such as Wow, Prey and recently I have been playing Lego Indiana Jones without any problems. I'm not sure what to do, if anyone can help me in any way I would appreciate it.

specs:
abut ip35e
e2180@3.4ghz (tested at stock as well so this is not the problem)
2x1gb Gskill pc6400 ram
antec 550 watt