nice oc. The exact round error was probably within the RAM. I'll give you a hint, leave only the 512MB stick in. It should give you a better oc as with multiple sticks, you have a higher chance that one will hold you back. Nice job though.
Thanks everyone for the comments. It's just too bad it isn't stable. I might work on that some time, but I'm content with 2.9GHz. I don't think there would be much of a gaming difference between 2.9 and 3. I may try that 1 512MB stick of RAM thing though, ownage. I didn't think of that.
EDIT: Oh, and I forgot to say, it was very unstable. May have been the RAM, but when I opened CSS, within a quarter second, it crashed.