Available in this download is the latest BIOS update for the MSI KT3 Ultra2 motherboard operating under Windows 95/98/Me/2000/XP. This update features support for AMD Athlon XP2400+ and XP2600+ and fixes a Windows XP EventViewer ACPI error.

Note: This BIOS is intended for MS-6380E PCB with KT266A and KT333 chipset. K7T266 Pro2-A and K7T266 Pro2-RU don't use the same BIOS.