I was considering OC'ing my Q9450, apparently it's stable on this board at 3.2GHz (from 2.66) with a beefed up cooler.
Then I read a few posts by people that had overclocked theirs for a few months only to discover it became unstable and remains so even at the stock speed.
Considering how much it cost, I think I'll give it a miss. My GTX came pre-overclocked by XFX, from a core speed of 576 to 640MHz, shader clocks up to 1363MHz and the memory speed to 2300MHz. That's fast enough for me considering my previous (PC) graphics card was a GeForce 4 MX...