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Key Features

  • ATX Form Factor
  • Intel B660 Chipset
  • LGA 1700 Socket
  • 4 x Dual-Channel DDR5-6200 (OC)
  • 6 x SATA III, 3 x M.2
  • 2 x PCIe x16 Slots, 1 x PCIe 3.0 x1
  • Wi-Fi 6E (802.11ax) | Bluetooth 5.2
  • USB 3.2 Gen 2, USB 3.2 Gen 2×2, USB 2.0
  • Windows 11 & 10 (64-Bit) Support

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Hardware Design Power Solution

Featuring a 12+1+1 duet rail power system, unleash and sustain maximum performance with an aggressive VRM design built with digital CPU power system. Combining 8 + 8-pin power connectors and exclusive Core Boost technology, the MSI MAG B660 TOMAHAWK WIFI DDR5 series motherboards are ready to sustain heavy gaming loads.

Core Boost

Core boost technology combines MSI’s premium layout and digital power design which allows for faster and undistorted current delivery to the CPU at pin-point precision. This creates the ideal conditions for multi-core CPUs while operating under high-loads. Additionally, MSI MAG B660 TOMAHAWK WIFI DDR5 Game Boost enables one-second overclocking, giving you the performance boost you need to get more out of your gaming experience.

More for Performance

  • MSI MAG B660 TOMAHAWK WIFI DDR5 Load line calibration makes sure your CPU voltage remains 100% stable under any load. This improves stability when demanding more CPU performance.
  • Overvoltage protection prevents potential short-circuit damage to the CPU and other critical components.
  • A fully digital power design allows for faster and undistorted current delivery to the CPU at pin-point precision. Creating the perfect conditions for CPU overclocking.
  • Two 8-pin connectors deliver adequate power even for an overclocked multi-core CPU.
  • Enhanced Performance Lightning Gen 4 M.2
  • Utilizing the 12th Gen Intel processors, the MSI B660 motherboard features Lightning Gen 4 M.2 which is a storage solution that provides transfer speeds up to 64 Gb/s.


  • Get a huge boost in DDR performance with latest MSI MAG B660 TOMAHAWK WIFI DDR5 memory. Combined with a dedicated SMT welding process and MSI Memory Boost technology, the MAG B660 TOMAHAWK WIFI is ready to deliver world-class memory performance.
  • The advanced SMT (Surface Mount Technology) DDR5 memory slot welding process reduces the defect rate of slot solder joints, electromagnetism, and interference.

XMP 3.0

The XMP (Extreme Memory Profiles) in MSI BIOS are tested and certified by the MSI OC LAB. It is easy to enable with auto power settings to get the best memory speed and stability.

Connectivity Networking

MSI MAG B660 TOMAHAWK WIFI DDR5 2.5 Gigabit LAN provides data-transfer speeds that are faster than general Gigabit LAN. This is an ideal solution for online gaming. Additionally, this motherboard features integrated Wi-Fi 6E. Wi-Fi 6E supports the 6 GHz spectrum, Bluetooth 5.2, two-way MU-MIMO, and BSS color technology, while providing up to four times the network capacity and efficiency in a high-signal-density environment, delivering speeds up to 2400 MB/s.


  • Enjoy high-quality sound in both stereo and surround sound thanks to a dedicated high-definition audio processor directly on the motherboard. High-quality audio capacitors provide a high-fidelity sound experience with strong acoustics and realism for studio-level headphones. Keep your sound in an ideal range by transmitting your audio with a pure digital signal thanks to the S/PDIF port on the rear I/O.
  • Similar to a dedicated sound card, the audio components and circuits have been laid on a reserved MSI MAG B660 TOMAHAWK WIFI DDR5 motherboard section and electrically isolated, while separated layers in the PCB ensure equally pristine sound quality for both left and right audio channels.


MSI MAG B660 TOMAHAWK WIFI DDR5 series motherboards offer a wide variety of options to connect and boost your USB devices, offering USB speeds up to 20 Gb/s when connecting the Rear USB Type-C. Additionally, this motherboard features a USB Front Type-C header which allows you to connect with the latest USB devices.

BIOS & Software Click BIOS 5

  • Get more from a loaded BIOS designed for ease of use. Fine-tune the motherboard for gaming performance, efficiency, or overclocking.
  • Choose from a preset of XMP profiles and automatically overclock compatible DDR memory.
  • Volume Management Device (VMD) enables direct control and management of NVMe SSDs from the PCIe bus without additional hardware adaptors.
  • M-Flash allows you to conveniently flash or upgrade the BIOS in a few minutes from the CMOS Setup Utility.
  • Get immediate access to your critical hardware information in real-time including temperatures, memory capacity, clock speed, and voltage thanks to the Hardware Monitor.
  • MSI MAG B660 TOMAHAWK WIFI DDR5 Memory Testing allows you to get the fastest speeds out of your system memory in a testing environment.
  • Search & favorites option in the top right corner of the BIOS moves you through all the BIOS menus quickly.

MSI Center

The MSI Center unifies a suite of MSI software utilities into a single centralized application. Take control of motherboard features and unleash endless possibilities.

Resizable BAR

Resizable BAR is an advanced PCI Express feature that enables the CPU to access the entire GPU frame buffer at once and improve performance.

Mystic Light

MSI MAG B660 TOMAHAWK WIFI DDR5 Mystic Light Extension pin header provides an intuitive way to control additional RGB strips and other RGB peripherals added to a system, without needing a separate RGB controller. Wireless devices are also controllable by using the MSI Center. Ambient Link synchronizes MSI Mystic Light products with on-screen gaming and scenarios, as well as the compatible lighting accessories.






Chipset Intel B660
CPU Socket LGA 1700

Back Panel I/O

USB 1 x USB 3.2 Gen 2×2 Type-C
4 x USB 3.1 / USB 3.2 Gen 2 Type-A
4 x USB 2.0 Type-A
Thunderbolt None
Display 1 x DisplayPort 1.4
1 x HDMI 2.0
Audio 5 x 3.5 mm
1 x S/PDIF
Ethernet / Controller 1 x Realtek RTL8125B-CG 2.5Gigabit
Wi-Fi Antenna 2 x Connector


Memory Slots 4 x 288-Pin
Memory Support DDR5 4000, 4800, 5200, 6200 MHz
Maximum Capacity 128 GB
Channel Architecture Dual Channel
ECC Support Non-ECC Unbuffered

Storage Expansion

M.2 1 x M Key 2242, 2260, 2280, 22110 (PCIe 4.0 x4)
1 x M Key 2242, 2260, 2280 (PCIe 4.0 x4, SATA III)
1 x M Key 2242, 2260, 2280 (PCIe 4.0 x2, SATA III)
Optane Memory Support Yes
RAID Support RAID 0, 1, 5, 10 (SATA)

Internal I/O

Expansion Slots 1 x PCIe 4.0 x16
1 x PCIe 3.0 x16 (x4 mode)
1 x PCIe 3.0 x1
USB 1 x USB 3.1 / USB 3.2 Gen 2 Header (Supports 1 USB Type-C Port)
1 x USB 3.1 / USB 3.2 Gen 1 Header (Supports 2 USB Type-A Port)
2 x USB 2.0 Header (Supports 4 USB Type-A Port)
Multi-GPU Support AMD CrossFireX
Air Cooling 1 x 4-Pin CPU
5 x 4-Pin System
Liquid Cooling 1 x 4-Pin Pump
Power Connectors 1 x 24-Pin Mainboard
2 x 8-Pin ATX
Security Chassis Intrusion, TPM Module
LED Header 4 x RGB
Audio 1 x S/PDIF
Diagnostics Clear CMOS
Add-On 1 x Thunderbolt Header

Front Panel I/O

I/O Connection Headers AAFP


Audio Codec Realtek ALC1220P (7.1-Channel)


Bluetooth 5.2
Wi-Fi Wi-Fi 6E (802.11ax) (MU-MIMO)
Module Support 1 E Key M.2


Form Factor ATX
Dimensions 12.0 x 9.6″ / 30.5 x 24.4 cm

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