P6VXAT v1.0 maximum CPU and HDD supported information as below,
HDD:40G
CPU: Pentium III(FCPGA). 100Mhz FSB CPU - 1.0Ghz Pentium III(FCPGA). 133Mhz FSB CPU - 1.13Ghz
          Celeron (PPGA). 66Mhz FSB CPU - No support Celeron (FCPGA). 66Mhz FSB CPU - 766Mhz
          Celeron (FCPGA). 100Mhz FSB CPU - 1.1Ghz VIA C3 100Mhz FSB CPU - 700Mhz
          VIA C3 133Mhz FSB CPU - 733Mhz

Please update P6VXAT BIOS to 1.0c(08/13/2001

Please update BIOS to version1.0c.

Need to setup CPU speed via manual under CMOS setting

P6VXAT had to disable the AC resume function on BIOS code. According to VIA, the problem was due to a limitation of the VIA686A chip. VIA suggested that this function be removed.

We used to reserve 5V SB for the keyboard power on function. As the 686B chipset is unable to fully support the keyboard power on function, we removed this function from our BIOS but the hardware designation remained. That is why the NumLock LED always is on after the system is shut down.

The latest BIOS of P6VXAT is 2002/1/14 attached below. Please follow the steps to update BIOS:
 
1. Extract the utility and copy BIOS .bin file & awd flash tool into a bootable disk.
2. Boot from this bootable disk.
3. Execute the awd832b XXX.bin /sn/py/r
4. Load the default setting in BIOS setup.

• get_app Download Link