MSI MAG B660 TOMAHAWK WIFI - Motherboard Manual

Installing a Processor

Youtube

https://youtu.be/KMf9oIDsGes

Installing DDR5 memory

Youtube

https://youtu.be/XiNmkDNZcZk

Connecting the Front Panel Header

Youtube

http://youtu.be/DPELIdVNZUI

Installing the Motherboard

Youtube

https://youtu.be/wWI6Qt51Wnc

Connecting the Power Connectors

Youtube

http://youtu.be/gkDYyR_83I4

Installing SATA Drives

Youtube

http://youtu.be/RZsMpqxythc

Installing a Graphics Card

Youtube

http://youtu.be/mG0GZpr9w_A

Connecting Peripheral Devices

Power On

Case stand-off notification

To prevent damage to the motherboard, any unnecessary mounting stand-off between the motherboard circuits and the computer case is prohibited. The Case standoff keep out zone signs will be marked on the backside of motherboard (as shown below) to serve as a warning to user.

Avoid collision notification

Protective paint is printed around each screw hole to prevent parts from being scratched.

Specifications

CPU	Supports 12th Gen Intel® Core™ Processors, Pentium® Gold and Celeron® Processors Processor socket LGA1700 * Please go to www.msi.com to get the newest support status as new processors are released.
Chipset	Intel® B660 Chipset
Memory	4x DDR5 memory slots, supporting up to 192GB* Supports 1R 4800 MHz (by JEDEC & POR) Max. overclocking frequency: 1DPC 1R Max speed up to 6200+ MHz 1DPC 2R Max speed up to 5200+ MHz 2DPC 1R Max speed up to 4000+ MHz 2DPC 2R Max speed up to 4000+ MHz Supports Intel® XMP 3.0 OC Supports Dual Controller Dual-Channel mode Supports non-ECC, un-buffered memory * Please refer to www.msi.com for more information on compatible memory.
Expansion Slot	2x PCIe x16 slots PCI_E1 (From CPU) Support up to PCIe 4.0 PCI_E2 (From B660 chipset) Support up to PCIe 3.0 x4 1x PCIe 3.0 x1 slot (From B660 chipset)
Multi-GPU	Supports AMD CrossFire™ Technology
Onboard Graphics	1x HDMI 2.1 with HDR port, supporting a maximum resolution of 4K 60Hz*/** 1x DisplayPort 1.4 port with HBR3, supporting a maximum resolution of 4K 60Hz*/** * Available only on processors featuring integrated graphics. ** Graphics specifications may vary depending on the CPU installed.
Storage	6x SATA 6Gb/s ports SATA5~8 (From B660 chipset) SATAA~B (From ASM1061) 3x M.2 slots (Key M) M2_1 slot (From CPU) Supports up to PCIe 4.0 x4 Supports 2242/ 2260/ 2280/ 22110 storage devices M2_2 & M2_3 slots (From B660 chipset) M2_2 supports up to PCIe 4.0 x4 M2_3 supports up to PCIe 4.0 x2* Supports SATA up to 6Gb/s Supports 2242/ 2260/ 2280 storage devices Supports Intel® Optane™ Memory Supports Intel® Smart Response Technology for Intel Core™ processors * SATA7 will be unavailable when installing M.2 SATA SSD in the M2_3 slot.
RAID	Supports RAID 0, RAID 1, RAID 5 and RAID 10 for SATA storage devices* * SATAA & SATAB do not support RAID function.
USB	Intel® B660 Chipset 1x USB3.2 Gen 2x2 20Gbps port (Type-C port on the back panel) 5x USB 3.2 Gen 2 10Gbps ports (4 Type-A ports on the back panel, 1 Type-C available through the internal connector) 2x USB 3.2 Gen 1 5Gbps Type-A ports available through the internal connector 8x USB 2.0 ports (4 Type-A ports on the back panel, 4 Type-A ports available through the internal connectors)
Audio	Realtek® ALC1220P Codec 7.1-Channel High Definition Audio Supports S/PDIF output
LAN	1x Realtek® RTL8125B-CG 2.5Gbps LAN controller
Wi-Fi & Bluetooth®	Intel® Wi-Fi 6E The Wireless module is pre-installed in the M.2 (Key-E) slot Supports MU-MIMO TX/RX, 2.4GHz/ 5GHz/ 6GHz*(160MHz) up to 2.4Gbps Supports 802.11 a/ b/ g/ n/ ac/ ax Supports Bluetooth® 5.3**, FIPS, FISMA * The usage of Wi-Fi 6GHz band relies on Windows 11 support and depends on every country's regulations. ** The Bluetooth version may be updated, please refer to the Wi-Fi chipset vendor's website for details.
Internal Connectors	1x 24-pin ATX main power connector 2x 8-pin ATX 12V power connectors 6x SATA 6Gb/s connectors 3x M.2 slots (M-Key) 1x USB 3.2 Gen 2 10Gbps Type-C port 1x USB 3.2 Gen 1 5Gbps connector (supports additional 2 USB 3.2 Gen 1 5Gbps ports) 2x USB 2.0 connectors (supports additional 4 USB 2.0 ports) 1x 4-pin CPU fan connector 1x 4-pin water-pump fan connector 5x 4-pin system fan connectors 1x Front panel audio connector 2x System panel connectors 1x Chassis Intrusion connector 1x Clear CMOS jumper 1x TPM module connector 1x TBT connector (supports RTD3) 1x Tuning Controller connector
LED Features	2x 4-pin RGB LED connectors 2x 3-pin RAINBOW LED connectors 4x EZ Debug LED
Back Panel Connectors	4x USB 2.0 Type-A ports 1x DisplayPort 1x HDMI port 4x USB 3.2 Gen 2 10Gbps Type-A ports 1x USB 3.2 Gen 2x2 20Gbps Type-C port 1x 2.5Gbps LAN (RJ45) port 2x Wi-Fi Antenna connectors 5x audio jacks 1x Optical S/PDIF OUT connector
I/0 Controller	NUVOTON NCT6687 Controller Chip
Hardware Monitor	CPU/ System/ Chipset temperature detection CPU/ System/ Pump fan speed detection CPU/ System/ Pump fan speed control
Form Factor	ATX Form Factor 12 in. x 9.6 in. (30.5 cm x 24.4 cm)
BIOS Features	1x 256 Mb flash UEFI AMI BIOS ACPI 6.4, SMBIOS 3.4 Multi-language
Software	Drivers MSI Center Intel Extreme Tuning Utility MSI APP Player (BlueStacks) Open Broadcaster Software (OBS) CPU-Z MSI GAMING Google Chrome™, Google Toolbar, Google Drive Norton™ Internet Security Solution
MSI Center Features	Gaming Mode Smart Priority Game Highlights LAN Manager Mystic Light Ambient Devices Frozr AI Cooling User Scenario True Color Live Update Hardware Monitoring -Super Charger Speed Up Smart Image Finder MSI Companion
Special Features	Audio Audio Boost Network 2.5G LAN LAN Manager Intel Wi-Fi Cooling All Aluminum Design Extended Heatsink Design M.2 Shield Frozr Pump Fan Smart Fan Control
Special Features	LED Mystic Light Mystic Light Extension (RAINBOW/RGB) Mystic Light SYNC Ambient Devices Support EZ DEBUG LED Performance Lightning Gen 4 PCI-E Slot Lightning Gen 4 M.2 Multi GPU-CrossFire Technology Memory Boost Core Boost Lightning USB 20G USB 3.2 Gen 2 10G USB with Type A+C Front USB Type-C Dual CPU Power: 8+8 pin 2oz Copper thickened PCB Protection PCI-E Steel Armor Pre-installed I/O Shield Experience MSI Center Click BIOS 5 CPU Cooler Tuning EZ M.2 Clip App player Tile

Package contents

Please check the contents of your motherboard package. It should contain:

Motherboard	MAG B660 TOMAHAWK WIFI
Documentation	Quick installation guide	1
	MSI reward program card	1
Application	Driver DVD	1
Cables	SATA 6Gb/s cables	1
Accessories	Wi-Fi antenna	1
	Case badge	1
	M.2 screw + standoff (2 sets/pack)	1
	M.2 screw + standoff (1 set/pack)	1
	EZ M.2 clip (1 set/pack)	2
	MAG sticker	1
	Product registration card	1

If any of the above items are damaged or missing, please contact your retailer.

Rear I/0 Panel

LAN Port LED Status Table

Audio Ports Configuration

(: connected, Blank: empty)

Realtek Audio Console

After Realtek Audio Console is installed. You can use it to change sound settings to get better sound experience.

• Device Selection - allows you to select a audio output source to change the related options. The check sign indicates the devices as default.
• Application Enhancement - the array of options will provide you a complete guidance of anticipated sound effect for both output and input device.
• Main Volume - controls the volume or balance the right/left side of the speakers that you plugged in front or rear panel by adjust the bar.
• Jack Status - depicts all render and capture devices currently connected with your computer.
• Connector Settings - configures the connection settings.

Auto popup dialog

When you plug into a device at an audio jack, a dialogue window will pop up asking you which device is current connected.

Each jack corresponds to its default setting as shown on the next page.

The pictures above for reference only and may vary from the product you purchased.

Audio jacks to headphone and microphone diagram

Audio jacks to stereo speakers diagram

Audio jacks to 7.1-channel speakers diagram

Installing antennas

1. Screw the antennas tight to the antenna connectors as shown below.
   
2. Orient the antennas.
   

Overview of Components

CPU Socket

Introduction to the LGA1700 CPU
The surface of the LGA1700 CPU has four notches and a golden triangle to assist in correctly lining up the CPU for motherboard placement. The golden triangle is the Pin 1 indicator.

• Always unplug the power cord from the power outlet before installing or removing the CPU.
• Please retain the CPU protective cap after installing the processor. MSI will deal with Return Merchandise Authorization (RMA) requests if only the motherboard comes with the protective cap on the CPU socket.
• When installing a CPU, always remember to install a CPU heatsink. A CPU heatsink is necessary to prevent overheating and maintain system stability.
• Confirm that the CPU heatsink has formed a tight seal with the CPU before booting your system.
• Overheating can seriously damage the CPU and motherboard. Always make sure the cooling fans work properly to protect the CPU from overheating. Be sure to apply an even layer of thermal paste (or thermal tape) between the CPU and the heatsink to enhance heat dissipation.
• Whenever the CPU is not installed, always protect the CPU socket pins by covering the socket with the plastic cap.
• If you purchased a separate CPU and heatsink/ cooler, Please refer to the documentation in the heatsink/ cooler package for more details about installation.
• This motherboard is designed to support overclocking. Before attempting to overclock, please make sure that all other system components can tolerate overclocking. Any attempt to operate beyond product specifications is not recommended. MSI® does not guarantee the damages or risks caused by inadequate operation beyond product specifications.

DIMM Slots

Memory module installation recommendation

• Always insert memory modules in the DIMMA2 slot first.
• To ensure system stability for Dual channel mode, memory modules must be of the same type, number and density.
• Some memory modules may operate at a lower frequency than the marked value when overclocking due to the memory frequency operates dependent on its Serial Presence Detect (SPD). Go to BIOS and find the DRAM Frequency to set the memory frequency if you want to operate the memory at the marked or at a higher frequency.
• It is recommended to use a more efficient memory cooling system for full DIMMs installation or overclocking.
• The stability and compatibility of installed memory module depend on installed CPU and devices when overclocking.
• Please refer to www.msi.com for more information on compatible memory.

PCI_E1~3: PCIe Expansion Slots

• If you install a large and heavy graphics card, you need to use a tool such as MSI Graphics Card Bolster to support its weight to prevent deformation of the slot.
• For a single PCIe x16 expansion card installation with optimum performance, using the PCI_E1 slot is recommended.
• When adding or removing expansion cards, always turn off the power supply and unplug the power supply power cable from the power outlet. Read the expansion card's documentation to check for any necessary additional hardware or software changes.

JFP1, JFP2: Front Panel Connectors

These connectors connect to the switches and LEDs on the front panel.

M2_1~3: M.2 Slots (Key M)

• Intel® RST only supports PCIe M.2 SSD with UEFI ROM.
• M2_2~3 slots support Intel® Optane™ Memory.

M.2 slot installation

1. Loosen the screws of M.2 SHIELD FROZR heatsink.
2. Remove the M.2 SHIELD FROZR and remove the protective films from the thermal pads.
   
3. If there is no EZ M.2 clip installed, please install the supplied EZ M.2 clip kit in the M.2 slot according to your SSD length.
4. Insert your M.2 SSD into the M.2 slot at a 30-degree angle.
5. Rotate the EZ M.2 clip to fix the M.2 SSD.
   
6. Put the M.2 SHIELD FROZR heatsink back in place and secure it.
   

SATA5~8 & SATAA~B: SATA 6Gb/s Connectors

These connectors are SATA 6Gb/s interface ports. Each connector can connect to one SATA device.

• Please do not fold the SATA cable at a 90-degree angle. Data loss may result during transmission otherwise.
• SATA cables have identical plugs on either sides of the cable. However, it is recommended that the flat connector be connected to the motherboard for space saving purposes.
• SATA7 will be unavailable when installing M.2 SATA SSD in the M2_3 slot.

JAUD1: Front Audio Connector

This connector allows you to connect audio jacks on the front panel.

1	MIC L	2	Ground
3	MIC R	4	NC
5	Head Phone R	6	MIC Detection
7	SENSE_SEND	8	No Pin
9	Head Phone L	10	Head Phone Detection

CPU_PWR1~2, ATX_PWR1: Power Connectors

These connectors allow you to connect an ATX power supply.

Tab.1

CPU_PWR1~2
1	Ground	5	+12V
2	Ground	6	+12V
3	Ground	7	+12V
4	Ground	8	+12V

Tab.2

ATX_PWR1
1	+3.3V	13	+3.3V
2	+3.3V	14	-12V
3	Ground	15	Ground
4	+5V	16	PS-ON#
5	Ground	17	Ground
6	+5V	18	Ground
7	Ground	19	Ground
8	PWR OK	20	Res
9	5VSB	21	+5V
10	+12V	22	+5V
11	+12V	23	+5V
12	+3.3V	24	Ground

Make sure that all the power cables are securely connected to a proper ATX power supply to ensure stable operation of the motherboard.

JDASH1: Tuning Controller connector

This connector is used to connect an optional Tuning Controller module.

1	No Pin	2	NC
3	MCU_SMB_SCL_M	4	MCU_SMB_SDA_M
5	VCC5	6	Ground

JTPM1: TPM Module Connector

This connector is for TPM (Trusted Platform Module). Please refer to the TPM security platform manual for more details and usages.

1	SPI Power	2	SPI Chip Select
3	Master In Slave Out (SPI Data)	4	Master Out Slave In (SPI Data)
5	Reserved	6	SPI Clock
7	Ground	8	SPI Reset
9	Reserved	10	No Pin
11	Reserved	12	Interrupt Request

JUSB4: USB 3.2 Gen 2 Type-C Connector

This connector allows you to connect USB 3.2 Gen 2 Type-C connector on the front panel. The connector possesses a foolproof design. When you connect the cable, be sure to connect it with the corresponding orientation.

JUSB3: USB 3.2 Gen 1 Connector

This connector allows you to connect USB 3.2 Gen 1 5Gbps ports on the front panel.

1	Power	11	USB2.0+
2	USB3_RX_DN	12	USB2.0-
3	USB3_RX_DP	13	Ground
4	Ground	14	USB3_TX_C_DP
5	USB3_TX_C_DN	15	USB3_TX_C_DN
6	USB3_TX_C_DP	16	Ground
7	Ground	17	USB3_RX_DP
8	USB2.0-	18	USB3_RX_DN
9	USB2.0+	19	Power
10	Ground	20	No Pin

Note that the Power and Ground pins must be connected correctly to avoid possible damage.

JUSB1~2: USB 2.0 Connectors

These connectors allow you to connect USB 2.0 ports on the front panel.

1	VCC	2	VCC
3	USB0-	4	USB1-
5	USB0+	6	USB1+
7	Ground	8	Ground
9	No Pin	10	NC

• Note that the VCC and Ground pins must be connected correctly to avoid possible damage.
• In order to recharge your iPad, iPhone and iPod through USB ports, please install MSI Center utility.

JTBT1: Thunderbolt Add-on Card Connector

This connector allows you to connect the add-on Thunderbolt I/O card.

1	TBT_FORCE_PWR	2	TBT_S0IX_ENTRY_REQ
3	TBT_CIO_PLUG_EVENT#	4	TBT_S0IX_ENTRY_ACK
5	SLP_S3#_TBT	6	TBT_PSON_OVERRIDE_N
7	SLP_S5#_TBT	8	No Pin
9	Ground	10	SMBCLK_VSB
11	DG_PEWAKE#	12	SMBDATA_VSB
13	TBT_RTD3_PWR_EN	14	Ground
15	TBT_CARD_DET_R#	16	PD_IRQ#

CPU_FAN1, PUMP_FAN1, SYS_FAN1~5: Fan Connectors

Fan connectors can be classified as PWM (Pulse Width Modulation) Mode or DC Mode. PWM Mode fan connectors provide constant 12V output and adjust fan speed with speed control signal. DC Mode fan connectors control fan speed by changing voltage. However, you can follow the instruction below to adjust the fan connector to PWM or DC Mode manually.

Connector	Default fan mode	Max. current	Max. power
CPU_FAN1	PWM mode	2A	24W
PUMP_FAN1	PWM mode	3A	36W
SYS_FAN1~5	DC mode	1A	12W

Switching fan mode and adjusting fan speed

You can switch between PWM mode and DC mode and adjust fan speed in BIOS > HARDWARE MONITOR.

There are gradient points of the fan speed that allow you to adjust fan speed in relation to CPU temperature.

Make sure fans are working properly after switching the PWM/ DC mode.

Pin definition of fan connectors

PWM Mode pin definition

1	Ground	2	+12V
3	Sense	4	Speed Control Signal

DC Mode pin definition

1	Ground	2	Voltage Control
3	Sense	4	NC

JCI1: Chassis Intrusion Connector

This connector allows you to connect the chassis intrusion switch cable.

Using chassis intrusion detector

1. Connect the JCI1 connector to the chassis intrusion switch/ sensor on the chassis.
2. Close the chassis cover.
3. Go to BIOS > SETTINGS > Security > Chassis Intrusion Configuration.
4. Set Chassis Intrusion to Enabled.
5. Press F10 to save and exit and then press the Enter key to select Yes.
6. Once the chassis cover is opened again, a warning message will be displayed on screen when the computer is turned on.

Resetting the chassis intrusion warning

1. Go to BIOS > SETTINGS > Security > Chassis Intrusion Configuration.
2. Set Chassis Intrusion to Reset.
3. Press F10 to save and exit and then press the Enter key to select Yes.

JRGB1~2: RGB LED connectors

The JRGB connectors allow you to connect the 5050 RGB LED strips 12V.

1	+12V	2	G
3	R	4	B

RGB LED Fan Connection

RGB LED Fan Connection

• The JRGB connector supports up to 2 meters continuous 5050 RGB LED strips (12V/G/R/B) with the maximum power rating of 3A (12V).
• Always turn off the power supply and unplug the power cord from the power outlet before installing or removing the RGB LED strip.
• Please use MSI's software to control the extended LED strip.

JRAINBOW1~2: Addressable RGB LED connectors

The JRAINBOW connectors allow you to connect the WS2812B Individually Addressable RGB LED strips 5V.

1	+5V	2	Data
3	No Pin	4	Ground

Addressable RGB LED Strip Connection

Addressable RGB LED Fan Connection

Do not connect the wrong type of LED strips. The JRGB connector and the JRAINBOW connector provide different voltages, and connecting the 5V LED strip to the JRGB connector will result in damage to the LED strip.

• The JRAINBOW connector supports up to 75 LEDs WS2812B Individually Addressable RGB LED strips (5V/Data/Ground) with the maximum power rating of 3A (5V). In the case of 20% brightness, the connector supports up to 200 LEDs.
• Always turn off the power supply and unplug the power cord from the power outlet before installing or removing the RGB LED strip.
• Please use MSI's software to control the extended LED strip.

JBAT1: Clear CMOS (Reset BIOS) Jumper

There is CMOS memory onboard that is external powered from a battery located on the motherboard to save system configuration data. If you want to clear the system configuration, set the jumpers to clear the CMOS memory.

Resetting BIOS to default values

1. Power off the computer and unplug the power cord.
2. Use a jumper cap to short JBAT1 for about 5-10 seconds.
3. Remove the jumper cap from JBAT1.
4. Plug the power cord and Power on the computer.

Onboard LEDs

EZ Debug LED

These LEDs indicate the debug status of the motherboard.

CPU - indicates CPU is not detected or fail.
DRAM - indicates DRAM is not detected or fail.
VGA - indicates GPU is not detected or fail.
BOOT - indicates the booting device is not detected or fail.

Installing OS, Drivers & MSI Center

Please download and update the latest utilities and drivers at www.msi.com

Installing Windows 10/ Windows 11

1. Power on the computer.
2. Insert the Windows 10/ Windows 11 installation disc/USB into your computer.
3. Press the Restart button on the computer case.
4. Press F11 key during the computer POST (Power-On Self Test) to get into Boot Menu.
5. Select the Windows 10/ Windows 11 installation disc/USB from the Boot Menu.
6. Press any key if screen shows Press any key to boot from CD or DVD... message. If not, please skip this step.
7. Follow the instructions on the screen to install Windows 10/ Windows 11.

Installing Drivers

1. Start up your computer in Windows 10/ Windows 11.
2. Insert MSI® USB Drive into the USB port.
3. Click the Select to choose what happens with this disc pop-up notification, then select Run DVDSetup.exe to open the installer. If you turn off the AutoPlay feature from the Windows Control Panel, you can still manually execute the DVDSetup.exe from the root path of the MSI USB Drive.
4. The installer will find and list all necessary drivers in the Drivers/Software tab.
5. Click the Install button in the lower-right corner of the window.
6. The drivers installation will then be in progress, after it has finished it will prompt you to restart.
7. Click OK button to finish.
8. Restart your computer.

MSI Center

MSI Center is an application that helps you easily optimize game settings and smoothly use content creation softwares. It also allows you to control and synchronize LED light effects on PCs and other MSI products. With MSI Center, you can customize ideal modes, monitor system performance, and adjust fan speed.

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 capabilities.

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 selftest process. It can also eliminate 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.

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 Setup

The default settings offer the optimal performance for system stability in normal conditions. You should always keep the default settings to avoid possible system damage or failure booting unless you are familiar with BIOS.

• BIOS items are regularly updated for better system performance. The items may be slightly different from the latest BIOS; therefore, the description is for reference only. You could also refer to the HELP information panel for BIOS item description.
• The BIOS screens, options and settings will vary depending on your system.

Entering BIOS Setup

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.

Function key

F1:	General Help list
F2:	Add/ Remove a favorite item
F3:	Enter Favorites menu
F4:	Enter CPU Specifications menu
F5:	Enter Memory-Z menu
F6:	Load optimized defaults
F7:	Switch between Advanced mode and EZ mode
F8:	Load Overclocking Profile
F9:	Save Overclocking Profile
F10:	Save Change and Reset*
F12:	Take a screenshot and save it to USB flash drive (FAT/ FAT32 format only).
Ctrl+F:	Enter Search page

* When you press F10, a confirmation window appears and it provides the modification information. Select between Yes or No to confirm your choice.

BIOS User Guide

If you'd like to know more instructions on setting up the BIOS, please refer to http://download.msi.com/manual/mb/Intel600BIOS.pdf or scan the QR code to access.

Functions may vary depending on the product you have.

Resetting BIOS

You might need to restore the default BIOS settings to solve certain problems. There are several ways to reset BIOS:

• Go to BIOS and press F6 to load optimized defaults.
• Short the Clear CMOS jumper on the motherboard.

Be sure the computer is off before clearing CMOS data. Please refer to the Clear CMOS jumper section for resetting BIOS.

Updating BIOS

Updating BIOS with M-FLASH

Before updating:
Please download the latest BIOS file that matches your motherboard model from MSI website. And then save the BIOS file into the USB flash drive.

Updating BIOS:

1. Insert the USB flash drive that contains the update file into the USB port.
2. Please refer the following methods to enter flash mode.
   • Reboot and press Ctrl + F5 key during POST and click on Yes to reboot the system.
     Press <Ctrl+F5> to activate M-Flash for BIOS update.
   • Reboot and press Del key during POST to enter BIOS. Click the M-FLASH button and click on Yes to reboot the system.
     
3. Select a BIOS file to perform the BIOS update process.
4. When prompted click on Yes to start recovering BIOS.
5. After the flashing process is 100% completed, the system will reboot automatically.

Updating the BIOS with MSI Center

Before updating:

• Make sure the LAN driver is already installed and the internet connection is set up properly.
• Please close all other application softwares before updating the BIOS.

To update BIOS:

1. Install and launch MSI Center and go to Support page.
2. Select Live Update and click on Advance button.
3. Select the BIOS file and click on Install button.
4. The installation reminder will appear, then click the Install button on it.
5. The system will automatically restart to update BIOS.
6. After the flashing process is 100% completed, the system will restart automatically.

Technical Support

If a problem arises with your system and no solution can be obtained from the user guide, please contact your place of purchase or local distributor. Alternatively, please try the following help resources for further guidance.

• Visit the MSI website for technical guide, BIOS updates, driver updates, and other information: http://www.msi.com
• Register your product at: http://register.msi.com

Revision History

• Version 2.0, 2021/12, First release.
• Version 2.1, 2022/1, Update list.
• Version 2.2, 2022/6, Update RAID info.
• Version 2.3, 2023/4, Update memory & Wi-Fi spec.

Safety Information

• The components included in this package are prone to damage from electrostatic discharge (ESD). Please adhere to the following instructions to ensure successful computer assembly.
• Ensure that all components are securely connected. Loose connections may cause the computer to not recognize a component or fail to start.
• Hold the motherboard by the edges to avoid touching sensitive components.
• It is recommended to wear an electrostatic discharge (ESD) wrist strap when handling the motherboard to prevent electrostatic damage. If an ESD wrist strap is not available, discharge yourself of static electricity by touching another metal object before handling the motherboard.
• Store the motherboard in an electrostatic shielding container or on an anti-static pad whenever the motherboard is not installed.
• Before turning on the computer, ensure that there are no loose screws or metal components on the motherboard or anywhere within the computer case.
• Do not boot the computer before installation is completed. This could cause permanent damage to the components as well as injury to the user.
• If you need help during any installation step, please consult a certified computer technician.
• Always turn off the power supply and unplug the power cord from the power outlet before installing or removing any computer component.
• Keep this user guide for future reference.
• Keep this motherboard away from humidity.
• Make sure that your electrical outlet provides the same voltage as is indicated on the PSU, before connecting the PSU to the electrical outlet.
• Place the power cord such a way that people can not step on it. Do not place anything over the power cord.
• All cautions and warnings on the motherboard should be noted.
• If any of the following situations arises, get the motherboard checked by service personnel:
  • Liquid has penetrated into the computer.
  • The motherboard has been exposed to moisture.
  • The motherboard does not work well or you can not get it work according to user guide.
  • The motherboard has been dropped and damaged.
  • The motherboard has obvious sign of breakage.
• Do not leave this motherboard in an environment above 60°C (140°F), it may damage the motherboard.

Documents / Resources

References

• MSI® HOW TO Install uninstall Intel LGA 1700 CPU - YouTube
• MSI® HOW-TO install or uninstall DIMM memory modules - YouTube
• - YouTube
• MSI® HOW-TO Install motherboard with torque screwdriver - YouTube
• MSI® HOW-TO install power supply connectors - YouTube
• MSI® HOW-TO install SATA HDD - YouTube
• MSI® HOW-TO Install graphics card on PCIe x16 slot with butterfly lock - YouTube
• MSI® HOW-TO install or uninstall DIMM memory modules - YouTube
• MSI® HOW-TO install front panel connectors (JFP1) - YouTube
• MSI® HOW-TO Install motherboard with torque screwdriver - YouTube
• MSI - Redirect
• http://download.msi.com/manual/mb/Intel600BIOS.pdf
• Welcome to MSI Member Account Login | MSI Member Center

Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download MSI MAG B660 TOMAHAWK WIFI - Motherboard Manual