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ATX motherboard in black with silver heatsinks, paired with Ryzen 9 9900X3D CPU in grey and silver

MSI

MSI MAG X870E GAMING PLUS MAX WIFI & Ryzen 9 9900X3D combo

SKU CH-5Y34-WV5AP

AM5 motherboard and Ryzen 9 9900X3D CPU bundle with DDR5 up to 8200 MT/s, PCIe 5.0 graphics and M.2, Wi-Fi 7, 5G LAN and tool-less EZ M.2 Shield Frozr II

  • ProcessorSupports AMD Ryzen 9000/ 8000/ 7000 Series Desktop Processor
  • ChipsetAMD X870E
  • Form factorATX
  • CPU socketAM5
  • Memory slot count4x DDR5 UDIMM
  • Supported memoryMemory Support DDR5 8200–5600 (OC) MT/s / 5600–4800 (JEDEC)

CPU +Ryzen 9 9900X3D

  • Supports up to 256GB DDR5 memory for large workloads
  • PCIe 5.0 x16 slot delivers 128GB/s bandwidth for modern GPUs
  • 5G LAN and Wi-Fi 7 with 320MHz channel reach 5.8Gbps wireless speed
  • Tool-free EZ M.2 Shield Frozr II simplifies installation of three M.2 drives
  • 64MB BIOS ROM enables compatibility with future Ryzen CPU upgrades

AM5 Platform with Ryzen 9 9900X3D

This combo pairs the MAG X870E GAMING PLUS MAX WIFI motherboard with the AMD Ryzen 9 9900X3D processor. It targets enthusiasts building a high-performance desktop around the AM5 socket. The board supports Ryzen 9000, 8000 and 7000 series CPUs and delivers dual-channel DDR5 memory architecture.

Sustained Load Behaviour

The extended PWM heatsink design helps the voltage regulators stay cool during prolonged heavy workloads, allowing the 9900X3D to maintain high frequencies. The OC Engine clock generator assists stable operation when the CPU is pushed continuously. Three M.2 slots include Shield Frozr cooling to keep Gen5 and Gen4 storage from throttling under sustained transfers.

Compatibility Checklist

Verify your chassis fits an ATX board and provides clearance for the extended heatsink. Ensure the power supply has sufficient 8-pin CPU connectors for the 9900X3D. Confirm DDR5 modules match the supported speeds — up to 8200 MT/s OC with one DIMM per channel or 6400 MT/s with two per channel. Check that your GPU and M.2 drives align with the PCIe 5.0 x16 and Gen5 M.2 slot layouts.

How it compares

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

Price $923.99
Pricier than about 84% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Model nameMAG X870E GAMING PLUS MAX WIFI+9 9900 × 3D
Part numberMAG X870E GAMING PLUS MAX WIFI+9 9900 × 3D
Processor
ProcessorSupports AMD Ryzen 9000/ 8000/ 7000 Series Desktop Processors
CPU socketAM5
ChipsetAMD X870E
Memory
Memory slot count4x DDR5 UDIMM
Max supported RAM256 GB
Memory channelsDual Channel
ECC supportNon-ECC
BufferingUn-buffered
Storage
SATA ports4x SATA 6G
M.2 slots3 x M.2 (Support PCIe 5.0 x4 & PCIe 4.0 x4)
M.2_1 Source (From CPU) supports up to PCIe 5.0 x4 , supports 2280/2260 devices
M.2_2 Source (From Chipset) supports up to PCIe 4.0 x4 , supports 2280/2260 devices
M.2_3 Source (From Chipset) supports up to PCIe 4.0 x4 , supports 22110/2280 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 4.0 x4 (For Ryzen 9000/ 8700/ 8600/ 8400/ 7000 Series processors)
M.2_3 slot (From CPU)
Supports up to
Audio & video
Audio chipRealtek ALC897
Sound channels7.1 Channels
Connectivity
Ethernet controllerRealtek 8126VB
Maximum network speed5 Gbit/s
Bluetooth supportYes
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 4.0 x16 slots1 x PCI Express 4.0 x16
PCIe 3.0 x16 slots0 x PCI Express 3.0 x16
PCIe x16 slots2 x PCI Express x16
PCIe x1 slots1 x PCI Express x1
Rear panel ports4 x USB 2.0
2 x USB 5 Gbit/s Type A
2 x USB 10 Gbit/s Type A
1 x USB 20 Gbit/s Type C
1 x USB 40 Gbit/s Type C
1 x HDMI
HDMI ports1 x HDMI
DisplayPort connectors1 x DisplayPort
Onboard USB headers1 x USB Type-C header, with USB 3.2 Gen 2 × 2 + 4 x USB 3.2 + 6 x USB 2.0
Size & build
Form factorATX
Width and length243.84 mm × 304.8 mm
Compatibility
Windows 11 supportSupported
More details
LightingNone RGB

Other versions of this model

5 more in the same range

Questions about this item

Will my DDR5-5600 memory run at its rated speed without manual tuning?

Yes, the board supports JEDEC DDR5-5600 out of the box, so modules rated at 5600 MT/s will operate at that speed automatically.

Can I install three M.2 SSDs at once and keep the primary PCIe 5.0 x16 slot running at full speed?

Yes, the three M.2 slots are wired from separate sources — CPU, chipset and chipset — so populating all three does not reduce the primary PCIe 5.0 x16 lane allocation.

Does the 5G LAN port require a special cable to reach its rated throughput?

Standard Cat 6a or better Ethernet cable is sufficient for the 5 Gbps LAN controller; no proprietary cabling is needed.

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