agree. i am a nvidia user. i am using 7900GT.. the program they give, i cannot understand at all.. i can't use it.. haha.. just use riva tuner.. i am using it.. can OC now.. hehe.. but everytime u OC, to confirm it work, u must test it.. use 3dmark to test the OC performance.. if it lags at the first try, then it means ur OC is not good, and re do it again.. hehe.. ^^ cheers