No doubt companies are hard at work creating their overclocked models of the 9800 GTX, and it will be interesting to see what speeds they come up with. Without getting into any crazy cooling solutions, it seems that the 9800 GTX is quite the overclocker.
On average we see about a 10% performance increase with the clocks we've achieved here, and they should be pretty achievable on most brands. The 9800 GTX continues to be a good card, but even with a decent overclock like this it continues to not be the revolutionary jump that we expected from the 9 series of cards.
Getting 10% extra performance out of the card probably isn't a deal breaker for you, but if you've just picked one up or you're about to, it's good to know that you can get a bit of extra performance out of the card quite easily and freely.