Got to be my epox 9npa-ultra mob. its NF-4 chipset...with a 4600x2 and 7900GTX with a raptor 10,000rpm 76GB hdd. all works apart from the USB freeze up the system now and then. not bad for 8 years old system. got some very old pci 32mb gpu and agp 64bit gpu next to useless now a days lol...