After adding the coolbits registry hack to my system I started overclocking the card from its stock speed of 425MHz/500MHz. This is the first time I have used the "Detect Optimal Frequencies" button which worked really well. After it finished testing different speeds it overclocked the card to 495Mhz/630Mhz. I then tried to push the card farther than what it set it to but running it any faster would cause artifacts to appear or the system to lock up. This overclock is quite nice and will give you some extra power which will make gaming less choppy and more enjoyable.