I use the coolbits registry edit to OC my GF4 Ti4200 128mb. It runs fine OC'ed. And I make sure the "apply settings at startup" is checked. Sometimes when windows XP starts up, it will start up with with OC'ed settings. But other times it wont, and I go to check out the clock frequencies tab and it is set to default speeds (250 core, 446 mem). Whats with this? Is there a way I can fix it?