I am having AMD 3200+,ASUS SLI-deluxe mobo,512 mb ram, GF6600 LE ,200 GB WDC.The problem is when ever I watch movies the picture hangs for few seconds and continues.and some times i get a blue screen.I am having two ram modules one is 256 DDR 333 and the othe one is 256 DDR 400.what is the...