Ok so i OC'ed my 7800GT in Rivatuner to 500/1150 from 475/1070 and for some reason i wasn't getting any performance increase in Games. I checked Rivatuner and it reset my clock values back down to the original 475/1070. This happens everytime i restart windows. Yes, i did check the box where it says apply OC at windows startup. Is there anything else that i need to do?