I just built a new PC using a 2.8ghz i7 with 4gb ram and a gts250 graphics card. Now all is well except for the performance is not what i'd expect it to be. HD video for instance is using almost no cpu, which normally would be attributed to the new powerful processor, but it's jumpy and has audio sync issues. My old amd x2 2ghz seems better on some fronts. Anyone have an idea as to why its so crappy.