according to ASUStek's website:
"P3B-F Beta BIOS 1008.004
Microcode update for Cu-Mine C-0 stepping (SC242) Cu-Mine C-0 stepping (PGA370)
Revise legacy USB code to Fix Win2K reboot failure
Fix data corrupt when USB Mouse/PS2 KB or USB KB/PS2 Mouse active at the same time.
Revise CPU multiplier handling for unlocked CPU. "
1008 Beta 004 is the version this mobo has