for some reason I am having performance issues with my amd 6870(limited edition) I just put together a pc for the first time. spec are: Asus p8z77 v lx, i5 3570k (not overclocked yet),amd 6870, 8gb Kingston hyper x ram 1600mhz, WD 1.5 TB HDD (pretty fast and used), corsair 750w PSU most games run fine but I am not getting the frame rates that other people get with basically the same specs. what can I do, other than lowering the graphics, that will increase my performance???