hi. i just finished my first build. i7 chip. evga x58 motherboard. invidia gtx 275. im not happy with my picture while playing games. dvds play great. i have not oc'ed anything yet. my scores are all 5's in windows vista control panel, but the two scores pertaining to video performance are both 1's. i dont want to screw things up in bios unless im sure it will help. device manager says gpu is working properly. please help.