MSI B550 GAMING GEN3 AM4 ATX Motherboard - Manual (Page 45)

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UEFI BIOS
MSI UEFI BIOS is compatible with UEFI (Unified Extensible Firmware Interface)
architecture. UEFI has many new functions and advantages that traditional BIOS
cannot achieve, and it will completely replace BIOS in the future. The MSI UEFI
BIOS uses UEFI as the default boot mode to take full advantage of the new chipset’s
capabilities.
⚠
Important
The term BIOS in this user guide refers to UEFI BIOS unless otherwise noted.
UEFI advantages
∙ Fast booting - UEFI can directly boot the operating system and save the BIOS self-
test process. And also eliminates the time to switch to CSM mode during POST.
∙ Supports for hard drive partitions larger than 2 TB.
∙ Supports more than 4 primary partitions with a GUID Partition Table (GPT).
∙ Supports unlimited number of partitions.
∙ Supports full capabilities of new devices - new devices may not provide backward
compatibility.
∙ Supports secure startup - UEFI can check the validity of the operating system to
ensure that no malware tampers with the startup process.
Incompatible UEFI cases
∙ 32-bit Windows operating system - this motherboard supports only Windows 10/
Windows 11 64-bit operating system.
∙ Older graphics card - the system will detect your graphics card. If you use older
graphics cards, it may display a warning message There is no GOP (Graphics Output
protocol) support detected in this graphics card .
⚠
Important
We recommend that you replace it with a graphics card supporting GOP/UEFI or use
CPU with integrated graphics for having normal function.
How to check the BIOS mode?
1. Power on your computer.
2. Press Delete key, when the Press DEL key to enter Setup Menu, F11 to enter Boot
Menu message appears on the screen during the boot process.
3. After entering the BIOS, you can check the BIOS Mode at the top of the screen.
BIOS Mode: UEFI