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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. When display a

warning message There is no GOP (Graphics Output protocol) support detected in

this graphics card.

⚠

Important

We recommend that you to replace with a GOP/UEFI compatible graphics card or

using integrated graphics from CPU 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

Other manuals for MSI MAG B660 TOMAHAWK WIFI DDR4

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General

Processor socket	LGA 1700
Processor manufacturer	Intel
Compatible processor series	Intel Celeron, Intel Core i3, Intel Core i5, Intel Core i7, Intel Core i9, Intel Pentium Gold
Non-ECC	Yes
Memory channels	Dual-channel
Memory slots type	DIMM
Number of memory slots	4
Supported memory types	DDR4-SDRAM
Maximum internal memory	128 GB
Supported memory clock speeds	2133, 2400, 2666, 2933, 3200, 3333, 3400, 3466, 3600, 3733, 3800, 4000, 4200, 4400, 4600, 4800 MHz
RAID levels	0, 1, 5, 10
Supported storage drive types	HDD & SSD
Supported storage drive interfaces	M.2, PCI Express 4.0, SATA III
Parallel processing technology support	Crossfire
USB 2.0 connectors	2
Number of SATA III connectors	6
USB 3.2 Gen 2 (3.1 Gen 2) connectors	1
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	0
Wi-Fi standards	802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax)
Bluetooth version	5.2
Top Wi-Fi standard	Wi-Fi 6 (802.11ax)
Ethernet interface type	2.5 Gigabit Ethernet
Component for	PC
Motherboard chipset	Intel B660
Audio output channels	7.1 channels
Motherboard form factor	ATX
BIOS type	-
Harmonized System (HS) code	84733020
Weight	1000 g