Can anyone advise?. I am going to change my cpu which is a Intel p4 2.5 ghz at 253 mhz fsb to a cpu at 3.6ghz 800fsb will i have to flash the BIOS or will my cpu be detected automatically. My mobo is a D1627-G ver. s26361-D1627. If i have to flash it can anyone tell me which file to use?.