Hi, my friend(has a gtx 680) keeps telling me that I am wrong for buying a gtx 770 and should have bought a gtx 680. He kerps saying that the 600 series is better. Please tell me the difference. I told him that the 770 outperforms the 680 in everything and he says that the benchmarks don't prove anything and the specs don't mean anything because nothing goes as it does on paper. He also saw some guy saying he had a problem overclocking his card and labeled the entire 700 series as bad overclockers. Please tell me the difference and help me convince him.