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A black ATX motherboard with silver heatsinks and a boxed Ryzen 9 9950X CPU

MSI

MSI MAG B850 TOMAHAWK MAX WIFI + Ryzen 9 9950X Combo AMD motherboard

SKU CH-VDNN-RMXDT

Pairs an AM5 motherboard with a 16-core Ryzen 9 9950X CPU, delivering DDR5 8400+ MT/s overclocking, PCIe 5.0 x16, Wi-Fi 7 and 5G LAN

  • CPU socketAM5
  • ChipsetAMD B850
  • Form factorATX
  • Memory slot count4 × 288pin (DDR5)
  • Supported memoryUp to DDR5 8400+ MT/s (OC)
  • Max supported RAM256 GB
  • Ryzen 9 9950X delivers 16 cores and 32 threads for heavy multi-tasking
  • 80A SPS VRM supplies stable power for sustained high-frequency operation
  • DDR5 memory boost reaches 8400+ MT/s overclocked for faster data throughput
  • PCIe 5.0 x16 and Gen5 M.2 enable 128GB/s bandwidth for graphics and storage
  • Wi-Fi 7 with 320MHz channel plus 5G LAN provides 5.8Gbps wireless and wired speed

Ready AM5 Platform

This bundle pairs the MAG B850 TOMAHAWK MAX WIFI motherboard with a Ryzen 9 9950X processor. The 16-core CPU reaches a 5.7 GHz maximum boost clock and provides 32 processing threads. The board delivers an 80A SPS VRM design built for sustained loads. It targets builders who want a matched set without selecting parts separately.

DDR5 8400 MT/s Ceiling

Four 288-pin slots support dual-channel DDR5 up to 256 GB total capacity. Ryzen 9000 series chips can reach 8400+ MT/s with one single-rank DIMM per channel, while two-rank modules top out near 6400 MT/s. JEDEC operation starts at 4800 MT/s and scales to 5600 MT/s. The memory ceiling decides whether the platform fits high-frequency workloads.

Tool-Free Install Notes

EZ PCIe Release unlocks the graphics card slot with a single press, and EZ M.2 Shield Frozr II secures drives without screws. PCI_E3 drops to x2 speed when M2_3 is populated unless the slot is switched to x4 in BIOS, which disables M2_3. The CPU ships without a cooler, so a separate AM5-compatible solution is required.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $839.99
Pricier than about 80% of the 1,906 comparable items (median $224.49).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameMSI
Model nameMAG B850 TOMAHAWK MAX WIFI+R9 9950X
Processor
CPU socketAM5
ChipsetAMD B850
Memory
Memory slot count4 × 288pin (DDR5)
Supported memoryUp to DDR5 8400+ MT/s (OC)
Max supported RAM256 GB
Memory channelsDual Channel
ECC supportNon-ECC
Storage
SATA ports4 x SATA 6Gb/s
SATA and RAID supportSupports RAID 0, RAID 1 and RAID 10 for M.2 NVMe storage devices
Audio & video
Audio chipRealtek ALC4080
Sound channels7.1 Channels
Connectivity
Ethernet controllerRealtek 8126VB
Maximum network speed5 Gbit/s
Wi-Fi standardWi-Fi 802.11 be
Bluetooth support5.4
Ports & slots
PCIe 5.0 x16 slotsPCI_E1 Gen PCIe 5.0 supports up to x16 (From CPU)
PCIe x1 slotsPCI_E2 Gen PCIe 3.0 supports up to x1 (From Chipset)
Onboard USB headers4 x USB 2.0 ports
4 x USB 5 Gbit/s Type A ports
1 x USB 20 Gbit/s Type C ports
Power
Power connectors1 x Power Connector(ATX_PWR)
2 x Power Connector(CPU_PWR)
1 x Power Connector(PCIE_PWR 8pin)
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Compatibility
Windows 11 support64-bit
More details
Lighting4 x EZ Debug LED
1 x EZ Memory Detection LED

Questions about this item

How does the 5.7 GHz max boost on the Ryzen 9 9950X behave once it is installed in this motherboard?

The processor can reach 5.7 GHz max boost when thermal and power headroom allow, and the 80A SPS VRM on this board is designed to deliver the current needed for sustained high frequencies.

What does PCIe 5.0 x16 from the CPU actually cap at for a graphics card or add-in card?

The primary PCI_E1 slot runs at PCIe 5.0 x16 directly from the Ryzen 9 9950X, providing full 5.0 bandwidth for a GPU; the secondary PCI_E3 slot is PCIe 4.0 x4 from the chipset and drops to x2 if M2_3 is populated.

What physical clearance and mounting points does the board need for the M.2 shields and the PCIe release button?

The board uses a standard ATX layout with four 288-pin DDR5 slots, three M.2 slots (22110/2280/2260) each with tool-less EZ M.2 Shield Frozr II, and an EZ PCIe Release button on the primary x16 slot for graphics-card removal.

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