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MSI X870 motherboard with Ryzen 9 9900X3D CPU, black PCB, silver heatsinks, four DDR5 slots, three M.2 shields

MSI

MSI X870 GAMING PLUS WIFI + Ryzen 9 9900X3D AMD motherboard combo

SKU CH-J4JM-0X4XQ

Socket AM5 motherboard and 12-core Ryzen 9 9900X3D bundle with DDR5 to 8200 MT/s, PCIe 5.0 graphics slot, Gen5 M.2, Wi-Fi 7 and 5G LAN

  • CPU socketAM5
  • ChipsetAMD X870
  • Form factorATX
  • Memory slot count4 × 288pin (DDR5)
  • Max supported RAM256 GB
  • Memory channelsDual Channel

CPU R9 9900X3D

  • AM5 socket supports Ryzen 9000 series processors including the 9900X3D
  • 14+2+1 Duet Rail power system with dual 8-pin CPU connectors
  • DDR5 memory overclocking up to 8200+ MT/s on four 288-pin slots
  • PCIe 5.0 x16 graphics slot plus Gen5 M.2 from CPU and Gen4 M.2 from chipset
  • Realtek 8126VB 5G LAN and Wi-Fi 7 with USB4 for fast connectivity

Combo for AM5 builds

This motherboard and CPU pair targets AM5 platform builders who want a ready-matched foundation. The MSI X870 GAMING PLUS WIFI board arrives paired with a Ryzen 9 9900X3D processor so socket compatibility is guaranteed out of the box. The combination suits gaming rigs and workstations that need high core counts and large cache.

Build integration and headroom

The board delivers a 14+2+1 Duet Rail power system fed by dual 8-pin CPU connectors and a 60A SPS VRM design on an 8-layer PCB with 2oz copper. Four DDR5 slots support up to 256GB at 8200 MT/s when overclocked, while a PCIe 5.0 x16 slot and three M.2 sockets — one Gen5 from the CPU and two Gen4 from the chipset — provide expansion lanes for graphics and storage. Wi-Fi 7 and 5G LAN handle networking without extra cards.

Sustained-load behaviour

Extended heatsinks, 7W/mK MOSFET pads and additional choke pads work with the EZ M.2 Shield Frozr II to move heat away from the VRM and the primary M.2 slot during long sessions. The 120W Zen 5 CPU with 128MB L3 cache maintains clocks under load while the 8-layer server-grade PCB helps distribute thermals evenly across the board. Realtek ALC897 7.1 audio and USB4 complete the feature set for extended use.

How it compares

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

Price $1,046.99
Pricier than about 90% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameMSI
Model nameX870 GAMING PLUS WIFI +R9 9900 × 3D
Processor
CPU socketAM5
ChipsetAMD X870
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 slots3x M.2
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 22110/2280 devices
M.2_3 Source (From Chipset) supports up to PCIe 4.0 x2, supports 2280/2260 devices
M2_1 slot
- 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)
*Please refer to the manual for M.2 SSD heatsink restrictions.
SATA and RAID supportSupports RAID 0 and RAID 1 for M.2 NVMe storage devices
Audio & video
Audio chipRealtek ALC897
Sound channels7.1 Channels
Connectivity
Ethernet controllerRealtek 8126VB 5G LAN
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 x4 slotsPCI_E4 Gen PCIe 4.0 supports up to x4 (From Chipset)
PCIe x1 slotsPCI_E2 Gen PCIe 3.0 supports up to x1 (From Chipset)
PCI_E3 Gen PCIe 3.0 supports up to x1 (From Chipset)
Additional slotsPCI_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)
* PCI_E4 slot will run at x2 speed when installing M.2 SSD in the M2_3 slot.
Onboard USB headers4 x USB 2.0 ports
2 x USB 5 Gbit/s Type A ports
1 x USB 10 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 supportSupport for Windows 11 64-bit

Other versions of this model

5 more in the same range

Questions about this item

Will the board fit a standard ATX case and clear tall DDR5 modules?

The board uses the ATX form factor with four 288-pin DDR5 slots; the extended heatsink and MOSFET pads rated for 7W/mK keep the VRM area clear for most air coolers and standard-height memory.

What CPU power connectors are required for the included Ryzen 9 9900X3D?

The motherboard provides dual 8-pin CPU power connectors fed by a 14+2+1 Duet Rail power system rated at 60A SPS, matching the processor's 120W base power draw.

Which M.2 slot should I use for a Gen5 NVMe drive and are heatsinks included?

M.2_1 is wired to the CPU and supports PCIe 5.0 x4 for 2280/2260 drives; the EZ M.2 Shield Frozr II covers that slot, while M.2_2 and M.2_3 run at PCIe 4.0 x4 from the chipset.

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