My friend brought his ASUS motherboard over, Skt 478 and it had a 2.20 Celeron in it.. So I put it in my case with my 6600GT/80GB wd 7.2K ATA/300w Antec PSU/512x2 Dual-Channel RAM... Now after post somtimes BIOS will come up and say CPU hung becasue of speed setup, but the speed was on 2200... also my monitor somtimes shuts off and gets a video cable connected when we go past post screen or when we restart the PC.. We are currently trying to install Windows XP but it won't go past the hardware setup page. It was also somtimes flicker on the screen and the screen will go to the standby and if we press enter a couple times it comes back...