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ATX motherboard in dark finish with silver heatsinks, CPU installed in AM5 socket

MSI

MSI MAG B850 TOMAHAWK MAX WIFI + Ryzen 7 9800X3D Combo AMD Motherboard

SKU CH-TFFX-461JS

AM5 motherboard and 8-core 16-thread CPU combo with 80A SPS VRM, DDR5 up to 8400+ MT/s, PCIe 5.0 x16, M.2 Gen5, Wi-Fi 7 and 5G LAN

  • CPU Socket TypeAM5
  • ChipsetAMD B850
  • Number of Memory Slots4x288pin (DDR5)
  • Memory StandardUp to DDR5 8400+ MT/s (OC)
  • Maximum Memory Supported256GB
  • Channel SupportedDual Channel
  • Ready-to-build combo with Ryzen 7 9800X3D CPU
  • 80 A SPS VRM feeds 8 cores and 16 threads cleanly
  • DDR5 up to 8400 MT/s overclocked for high frame rates
  • PCIe 5.0 x16 plus dual Gen5 M.2 slots for fastest GPUs and SSDs
  • Wi-Fi 7 320 MHz channel plus 5 Gbps LAN for low-latency networking

Combo for AM5 gaming builds

This bundle pairs the MSI MAG B850 TOMAHAWK MAX WIFI motherboard with the AMD Ryzen 7 9800X3D processor. The CPU delivers 8 cores and 16 threads with second-generation 3D V-Cache technology for low-latency gaming. The board uses the AMD B850 chipset and supports Ryzen 7000, 8000 and 9000 series processors.

Tool-less install with slot sharing notes

EZ PCIe Release lets you unlock the graphics card slot with a button press. EZ M.2 Shield Frozr II allows tool-less M.2 SSD and heatsink fitting. PCI_E3 runs at x2 speed when M2_3 is occupied; switching PCI_E3 to x4 in BIOS disables M2_3.

Check CPU cooler clearance and BIOS version

Verify your AM5 cooler mounting hardware is compatible. Ensure the motherboard BIOS supports Ryzen 9000 series before first boot. Confirm your power supply has the required 8-pin and 24-pin connectors for the 80A SPS VRM. Check case clearance for M.2 heatsinks if using all three slots.

Highlights

  • Ready-to-build combo with Ryzen 7 9800X3D CPU
  • 80 A SPS VRM feeds 8 cores and 16 threads cleanly
  • DDR5 up to 8400 MT/s overclocked for high frame rates
  • PCIe 5.0 x16 plus dual Gen5 M.2 slots for fastest GPUs and SSDs
  • Wi-Fi 7 320 MHz channel plus 5 Gbps LAN for low-latency networking

Specifications

BrandMSI
ModelMAG B850 TOMAHAWK MAX WIFI+R7 9800X3D
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

How can I confirm the 80A SPS VRM is delivering stable power to the Ryzen 7 9800X3D after assembly?

Enter the BIOS hardware monitor and verify the CPU core voltage remains steady under load; the board's 80A SPS VRM is designed for clean delivery to the 8-core 16-thread processor.

Which components are included in the combo box and what must I purchase separately to complete the build?

The box contains the MAG B850 TOMAHAWK MAX WIFI motherboard and the Ryzen 7 9800X3D CPU; you will still need DDR5 memory modules, a CPU cooler, storage drives, a graphics card, a power supply and a case.

Which memory speed tier should I select for the 4 DDR5 slots to match the board's 8400+ MT/s overclocking specification?

Choose a DDR5 kit rated for 8400 MT/s or higher; the board supports up to 8400+ MT/s (OC) with 1DPC 1R population and 256GB maximum capacity across four 288-pin slots.

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