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Black ATX motherboard with silver heatsinks and a boxed Ryzen 9 9900X processor

MSI

MSI MAG B850 TOMAHAWK MAX WIFI + Ryzen 9 9900X AMD motherboard & CPU combo

SKU CH-1T87-2TKWN

AM5 motherboard and 12-core Ryzen 9 9900X CPU combo with DDR5 8400+ MT/s overclocking, PCIe 5.0 x16, dual Gen5 M.2, 5G LAN and Wi-Fi 7

  • CPU Socket TypeAM5
  • ChipsetAMD B850
  • Number of Memory Slots4x288pin (DDR5)
  • Memory StandardUp to DDR5 8400+ MT/s (OC)
  • Maximum Memory Supported256GB
  • Channel SupportedDual Channel
  • 12-core 24-thread Ryzen 9 9900X reaches 5.6 GHz max boost
  • DDR5 memory overclocks to 8400+ MT/s on four 288-pin slots
  • PCIe 5.0 x16 graphics slot plus two CPU-linked M.2 slots at Gen 5 speed
  • 5 Gbps LAN and Wi-Fi 7 with 320 MHz channel deliver 5.8 Gbps peak wireless
  • Realtek ALC4080 audio with Audio Boost 5 isolation provides 7.1-channel output

Combo AM5 12 cœurs 8400 MT/s

The MSI MAG B850 TOMAHAWK MAX WIFI motherboard is paired with an AMD Ryzen 9 9900X processor. The CPU delivers 12 cores and 24 threads built on the Zen 5 architecture with a 5.6 GHz maximum boost clock. The board provides an 80 A SPS VRM design and four DDR5 slots supporting up to 256 GB at 8400+ MT/s when overclocked.

Idéal 12 cœurs DDR5 8400 OC

This combination suits builders who want a 12-core AM5 platform with strong memory overclocking headroom and 5 GbE plus Wi-Fi 7 connectivity. Users needing ECC memory or more than four DIMM slots should consider a different chipset.

VRM 80 A SPS DDR5 8400+ OC

The 80 A SPS power stage rating is the specification that defines the board’s ability to sustain high currents for the 12-core processor during heavy workloads and memory overclocking up to 8400+ MT/s.

Highlights

  • 12-core 24-thread Ryzen 9 9900X reaches 5.6 GHz max boost
  • DDR5 memory overclocks to 8400+ MT/s on four 288-pin slots
  • PCIe 5.0 x16 graphics slot plus two CPU-linked M.2 slots at Gen 5 speed
  • 5 Gbps LAN and Wi-Fi 7 with 320 MHz channel deliver 5.8 Gbps peak wireless
  • Realtek ALC4080 audio with Audio Boost 5 isolation provides 7.1-channel output

Specifications

BrandMSI
ModelMAG B850 TOMAHAWK MAX WIFI+R9 9900X
CPU Socket TypeAM5
ChipsetAMD B850
Number of Memory Slots4x288pin (DDR5)
Memory StandardUp to DDR5 8400+ MT/s (OC)
Maximum Memory Supported256GB
Channel SupportedDual Channel
ECC SupportedNon-ECC
Memory FeatureMemory Support DDR5 8400 - 5600 (OC) MT/s / 5600 - 4800 (JEDEC) MT/s
Ryzen 9000 Series Processors max. overclocking frequency:
- 1DPC 1R Max speed up to 8400+ MT/s
- 1DPC 2R Max speed up to 6400+ MT/s
- 2DPC 1R Max speed up to 6400+ MT/s
- 2DPC 2R Max speed up to 4800+ MT/s
Supports AMD POR Speed and JEDEC Speed
Supports Memory Overclocking and AMD EXPO
Supports Dual-Channel mode
Supports Non-ECC, Un-buffered memory
Supports CUDIMM, Clock Driver bypass mode only
PCI Express 5.0 x16PCI_E1 Gen PCIe 5.0 supports up to x16 (From CPU)
PCI Express x4PCI_E3 Gen PCIe 4.0 supports up to x4 (From Chipset)
*PCI_E3 slot will run at x2 speed when installing device in the M2_3 slot. You can switch PCI_E3 slot to x4 in the BIOS, but this will disable the M2_3 slot
PCI Express x1PCI_E2 Gen PCIe 3.0 supports up to x1 (From Chipset)
Serial ATA (SATA)4 x SATA 6Gb/s
M.2M.2_1 Source (From CPU) supports up to PCIe 5.0 x4 , supports 22110/2280 devices
M.2_2 Source (From CPU) supports up to PCIe 5.0 x4 , supports 2280/2260 devices
M.2_3 Source (From Chipset) supports up to PCIe 4.0 x2 , supports 2280/2260 devices
M.2_4 Source (From Chipset) supports up to PCIe 4.0 x4 , supports 2280/2260 devices
*PCI_E3 slot will run at x2 speed when installing device in the M2_3 slot. You can switch PCI_E3 slot to x4 in the BIOS, but this will disable the M2_3 slot.
** Please refer to the manual for M.2 SSD heatsink restrictions
SATA RAIDSupports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices
Audio ChipsetRealtek ALC4080
Audio Channels7.1 Channels
LAN ChipsetRealtek 8126VB
Max LAN Speed5Gbps
Wireless LANWi-Fi 802.11 be
BluetoothBluetooth 5.4
Onboard USB4 x USB 2.0 ports
4 x USB 5Gbps Type A ports
1 x USB 20Gbps Type C ports
Other Connectors1 x CPU Fan
1 x Combo Fan (Pump_Sys Fan)
6 x System Fan
1 x EZ Conn-header (JAF_2)
2 x Front Panel (JFP)
1 x Chassis Intrusion (JCI)
1 x Front Audio (JAUD)
3 x Addressable V2 RGB LED connector (JARGB_V2)
1 x RGB LED connector(JRGB)
1 x TPM pin header(Support TPM 2.0)
Form FactorATX
LED Lighting4 x EZ Debug LED
1 x EZ Memory Detection LED
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x Power Connector(ATX_PWR)
2 x Power Connector(CPU_PWR)
1 x Power Connector(PCIE_PWR 8pin)
Windows 11Windows 11 64-bit

Questions about this item

Will my existing DDR5 memory modules work with this board at their rated speeds?

The board supports DDR5 up to 8400+ MT/s when overclocked and runs at 5600 MT/s by default. Four 288-pin slots accept up to 256 GB in dual-channel mode; non-ECC modules are required.

Can I run a PCIe 5.0 graphics card and two PCIe 5.0 M.2 drives simultaneously?

Yes. The CPU provides one PCIe 5.0 x16 slot and two M.2 sockets that each support PCIe 5.0 x4, so a Gen 5 GPU and two Gen 5 SSDs all run at full speed.

What cooling solution do I need for the included Ryzen 9 9900X?

The processor does not ship with a cooler. You will need an AM5-compatible air or liquid cooler rated for a 12-core, 24-thread CPU with a 5.6 GHz maximum boost clock.

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