Overclocking woes (not too bad though)

I recently attempted to over clock my graphics with much success. Unfortunately, upon rebooting, I noticed that my performance in games and 3dmark was MUCH lower than it was previously. I set the clock speed back to the factory state with no luck and then attempted to reinstall the stock driver which also didn't help much. Temperatures during the over clock were not that high above the temp it would run at while under load previously (I didn't over clock by much!). How do I fix this so I can get back the performance that I had in the first place?

I'm guessing that my card is now somehow under clocked BY DEFAULT. Maybe ntune is setting the factory clock speeds at a lower speed.