After installing my 6670 (amd radeon powercolor HD 6670 2gb) I am having a memory clock problem, the default is set to 500Mhz instead of the "supposedly" 1000Mhz on the box, after even trying to add 100Mhz to it via CatalystControlCentre, I am having screen issues, please help me fix this. Also the benchmarks are really bad (400 points difference with 3D mark) compared to the ones on the actual reviews with benchmarks
