- BIOS Upgrade : 1.This BIOS support all ASUS Intel 430FX chipset motherboard. (PCI/I-P54TP4,P/I-P55TP4,P/I-P55TP4XE,P/I-P55TP4XEG,P/I-P55TP4N) 2.Change CPU display from 167Mhz to 166Mhz. 3.Support IDE auto detect when system turn on. 4.Support bootable CD ROM. 5.Support APM rev. 1.2. 6.Add disable NCR BIOS selection in CMOS. 7.Fix UnixWare 2.1 trap 8.Fix 3COM 3C619C warmboot hang up problem. 9.Update the AWARD BIOS to v4.51