P6IPAT v1.x maximum CPU and HDD supported information as below, HDD:40G Pentium III Tualatin 100 Mhz FSB CPU-1.2G Pentium III(FCPGA). 100Mhz FSB CPU –1G MHZ Pentium III(FCPGA). 133Mhz FSB CPU –1.13G MHZ Celeron 66Mhz(PPGA) FSB CPU –No support Celeron 66Mhz(FCPGA) FSB CPU –733 MHZ Celeron 100Mhz(FCPGA) FSB CPU –1.3GMHZ VIA C3 100Mhz FSB CPU - 700 MHZ VIA C3 133Mhz FSB CPU - 866 MHZ