okay i have an xp1800 with ecs k7s5a board.i am running 320 megs of pc 133 sdram.with xp when ever i try and hook my cable mode thru usb at the at black screen between loader and deadktop the system will just stay there.same thing with when i try to use a serial mouse just stays at black screeb.my system is just overall very unstable is it borrad or chip?shoul di use p4 instead?