MSI X99A GAMING 7 - Switch; BIOS1: Multi-BIOS Switch

Chapter 1
1-34Getting Started
Switch
BIOS1: Multi-BIOS Switch
This motherboard has two built-in BIOS ROMs (Labeled A and B, default BIOS ROM
is A). If one is crashed, you can shift to the other for booting by sliding the switch.
B A
Green LED
Blue LED
BAT1
BIOS recovery with AFUDOS command
When BIOS updating fails or causes the computer non-bootable, you can recover the
failed BIOS by the steps below.
Preparation:
1. Prepare a bootable USB 󰘱ash drive.
2. Download the latest BIOS 󰘰le from the MSI o󰘲cial website at www.msi.com, and
then decompress the 󰘰le.
3. Copy the AFUDE238.exe and the BIOS 󰘰le to the bootable USB 󰘱ash drive
BIOS recovery steps:
1. Power o󰘯 the computer.
2. Set the Multi-BIOS switch to the functional BIOS ROM.
3. Insert the bootable USB 󰘱ash drive you have made to the USB port.
4. Boot the computer into the bootable USB 󰘱ash drive.
5. Set the Multi-BIOS switch to the failed BIOS ROM.
6. Execute the below command to 󰘱ash the BIOS:
For example: AFUDE238 EXXXXIMS.XXX
7. Restart the computer after the BIOS 󰘱ashing is complete.
Important
Do not use the Multi-BIOS switch when system is booting up.