MSI X99S GAMING 9 AC - Switch; BIOS1: Multi-BIOS Switch

Chapter 1
1-35
Getting 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.
BIOS A
Green LED
Blue LED
BIOS B
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:
 󰘱
 󰘰󰘲
󰘰
 󰘰󰘱
BIOS recovery steps:
 󰘯
2. Set the Multi-BIOS switch to the functional BIOS ROM.
 󰘱
 󰘱
5. Set the Multi-BIOS switch to the failed BIOS ROM.
 󰘱
For example: AFUDE238 EXXXXIMS.XXX
 󰘱
Important
Do not use the Multi-BIOS switch when system is booting up.