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ATX motherboard with CPU installed, back-connect layout, dark finish

MSI

MSI MAG X870E TOMAHAWK MAX WIFI PZ AMD motherboard & Ryzen 9 9900X3D CPU Combo

SKU CH-DR08-4GVJZ

An AM5 motherboard and Ryzen CPU combo with back-connect design, Wi-Fi 7, 5G LAN, four M.2 slots, PCIe 5.0 graphics support and a 40 Gbps USB 4 port

  • CPU socketAM5
  • ChipsetAMD X870E
  • Form factorATX
  • Memory slot count4 × 288pin (DDR5)
  • Max supported RAM256 GB
  • Memory channelsDual Channel

CPU +Ryzen 9 9900X3D

  • Clean front view with easier cable routing thanks to back-connect design
  • 64 MB BIOS ROM enables future CPU compatibility
  • OC Engine with clock generator unlocks full processor performance
  • Built-in USB 4 port delivers 40 Gbps data transfer
  • 5 Gbps LAN and Wi-Fi 7 with 320 MHz channel for high-speed networking

AM5 Platform Combo

The MSI MAG X870E TOMAHAWK MAX WIFI PZ motherboard is paired with a Ryzen 9 9900X3D processor in a single AM5 package. The board uses the X870E chipset and a back-connect layout that moves primary headers to the rear for cleaner cable routing. Four DDR5 slots support up to 256 GB in dual-channel mode. A 64 MB BIOS ROM provides headroom for future CPU compatibility.

Builders Who Want Simplified Wiring

This combo suits enthusiasts building a high-end Ryzen 9000 system who value tidy internal routing and tool-less component swaps. The EZ PCIe Release button and EZ M.2 Shield Frozr II simplify graphics card and SSD installation. Builders needing ECC memory or a smaller form factor should consider alternative platforms.

ATX Back-Connect Ecosystem

The board requires an ATX case with a rear cable-management channel to fully utilise the back-connect design. Four M.2 sockets (two CPU-linked Gen 5.0, two chipset-linked Gen 4.0) and four SATA 6 Gb/s ports handle high-capacity storage arrays. A USB 40 Gbps port, 5 Gbps LAN and Wi-Fi 7 cover fast external and network connectivity.

How it compares

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

Price $1,077.99
Pricier than about 90% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Product lineMAG X870E TOMAHAWK MAX WIFI PZ+9 9900 × 3D
Model nameMAG X870E TOMAHAWK MAX WIFI PZ+9 9900 × 3D
Processor
CPU socketAM5
ChipsetAMD X870E
Memory
Memory slot count4 × 288pin (DDR5)
Max supported RAM256 GB
Memory channelsDual Channel
ECC supportNon-ECC
BufferingUn-buffered
Storage
SATA ports4 x SATA 6Gb/s
M.2 slotsM.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 x4 , supports 2280/2260 devices
M.2_4 Source (From Chipset) supports up to PCIe 4.0 x4 , supports 2280/2260 devices
M.2_1 slot (From CPU)
- Supports up to PCIe 5.0 x4 (For Ryzen 9000/ 7000 Series processors)
- Supports up to PCIe 4.0 x4 (For Ryzen 8000 Series processors)
M.2_2 slot (From CPU)
- Supports up to PCIe 5.0 x4 (For Ryzen 9000/ 7000 Series processors)
- Supports up
Audio & video
Audio chipRealtek ALC4080 Codec
7.1-Channel USB High Performance Audio
Supports up to 32-bit/384 kHz playback on front panel
Supports S/PDIF output
Sound channels7.1 Channels
Connectivity
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)
PCI_E1 slot
- Supports PCIe 5.0 x16 (For Ryzen 9000/ 7000 Series processors)
- Supports PCIe 4.0 x8 (For Ryzen 8700/ 8600/ 8400 Series processors)
- Supports PCIe 4.0 x4 (For Ryzen 8500/ 8300 Series processor)
PCIe x4 slotsPCI_E3 Gen PCIe 4.0 supports up to x4 (From Chipset)
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

Other versions of this model

5 more in the same range

Questions about this item

Do I need to buy DDR5 memory modules for the four 288-pin slots on this board?

Yes — the motherboard has four DDR5 slots supporting up to 256 GB in dual-channel mode, so DDR5 modules are required.

Will my existing PCIe 4.0 graphics card run at full x16 speed in the top slot with the Ryzen 9 9900X3D installed?

The Ryzen 9 9900X3D enables PCIe 5.0 x16 on the primary slot; a PCIe 4.0 card will operate at PCIe 4.0 x16, delivering its full rated bandwidth.

How can I confirm the USB4 port is delivering its 40 Gbps link after I plug in a device?

Check the port status in Windows Device Manager or the BIOS USB configuration screen — a negotiated 40 Gbps connection will be reported as USB4 Gen 3×2.

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