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ATX motherboard in black with silver heatsinks, boxed Ryzen 9 9900X3D CPU beside it

ASUS

ASUS PRIME X870-P WIFI + Ryzen 9 9900X3D AMD motherboard combo

SKU CH-EMKV-80QES

ATX AM5 motherboard paired with a 12-core Zen 5 CPU, 14+2+1 80A DrMOS power delivery, DDR5 up to 8000 MT/s, PCIe 5.0 x16 and M.2, Wi-Fi 7, 2.5Gb LAN and USB4 40Gbps

  • ChipsetAMD X870
  • Form factorATX
  • Memory slot count4 × 288pin (DDR5)
  • Supported memoryDDR5 4400
  • Max supported RAM192 GB
  • Memory channelsDual Channel

Motherboard PRIME X870-P WIFI

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CPU + R9 9900X3D

  • Stable power delivery for heavy workloads with 14+2+1 80A DrMOS stages and 8-layer PCB
  • Ultrafast wireless networking via Wi-Fi 7 and 2.5Gb Ethernet for low-latency data transfer
  • High-speed storage ready with PCIe 5.0 M.2 slot and four M.2 connectors supporting 2280 drives
  • Large memory capacity up to 192GB DDR5 running at 8000+ MT/s for demanding applications
  • Simplified assembly using pre-mounted I/O shield, PCIe Q-Release and M.2 Q-Latch for quick component swaps

Combo purpose

The ASUS PRIME X870-P WIFI motherboard paired with the Ryzen 9 9900X3D processor targets builders who want a ready-to-run AM5 platform for heavy multitasking and local AI workloads. The 120W CPU brings 128MB of L3 cache and integrated Radeon graphics, while the board supplies 14+2+1 80A DrMOS power stages on an 8-layer PCB. Dual-channel DDR5 support reaches 192GB at 4400 MT/s base with EXPO profiles available.

Sustained behaviour

The large VRM heatsink, dual M.2 heatsinks and PCH heatsink work with hybrid fan headers and Fan Xpert 4 to keep temperatures stable during long compile or inference sessions. PCIe 5.0 x16 and a PCIe 5.0 M.2_1 slot maintain full bandwidth for graphics and storage without throttling. Realtek 2.5Gb Ethernet and Wi-Fi 7 with Bluetooth 5.4 provide consistent network throughput, while the 7.1 audio codec handles extended playback cleanly.

Installation experience

A pre-mounted I/O shield, Q-Release for the PCIe slot and M.2 Q-Latch remove the usual screw-fumbling steps. BIOS FlashBack lets you update firmware without a CPU installed, and Q-LED Core plus Q-Dashboard give clear post-code feedback if something mis-seats. The flexible M.2 heatsink adapts to 2280 drives, and the Q-Antenna snaps onto the rear panel without threading.

How it compares

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

Price $1,063.99
Pricier than about 90% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Model namePRIME X870-P WIFI+R9 9900 × 3D
Processor
ChipsetAMD X870
Memory
Memory slot count4 × 288pin (DDR5)
Supported memoryDDR5 4400
Max supported RAM192 GB
Memory channelsDual Channel
ECC supportYes
BufferingUn-buffered
Storage
SATA ports2 x SATA 6Gb/s
SATA and RAID support* AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/5/10 and SATA RAID 0/1. RAID 5 Function is only supportted by AMD Ryzen 9000 series CPU.
Audio & video
Audio chipRealtek 7.1 Surround Sound High Definition Audio CODEC*
- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
- Supports up to 24-Bit/192 kHz playback
Audio Features
- Audio Shielding
- Premium audio capacitors
- Dedicated audio PCB layers
* A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.
Sound channels7.1 Channels
Connectivity
Maximum network speed2.5 Gbit/s
Wi-Fi standardWi-Fi 802.11 be
Bluetooth support5.4
Ports & slots
PCIe 5.0 x16 slotsAMD Ryzen 9000 & 7000 Series Desktop Processors
1 x PCIe 5.0 x16 slot (supports x16 mode)
Onboard USB headers1 x USB 10 Gbit/s connector (supports USB Type-C)
1 x USB 5 Gbit/s header supports 2 additional USB 5 Gbit/s ports
2 x USB 2.0 headers support 4 additional USB 2.0 ports
Power
Power connectors1 × 24-pin Main Power connector
2 × 8-pin +12 V CPU Power connectors
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Compatibility
Windows 11 supportSupported
More details
BIOS256 Mb Flash ROM, UEFI AMI BIOS

Other versions of this model

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Questions about this item

Will the CPU and motherboard arrive already paired, or do I need to install the processor myself?

This is a motherboard and CPU combo; the Ryzen 9 9900X3D is included but not pre-installed in the AM5 socket. You will mount the processor, attach the cooler and connect power before first boot.

What memory speed can I run reliably with this board and the 9900X3D?

The board supports DDR5 4400 as standard and can reach 8000+ MT/s with EXPO modules when using Ryzen 9000 series CPUs. Four 288-pin slots accept up to 192 GB total in dual-channel mode.

Which M.2 slot gives PCIe 5.0 speeds for a boot drive?

The primary M.2_1 slot (Key M, type 2280) runs at PCIe 5.0 x4 with Ryzen 9000 and 7000 series processors. A heatsink with Q-Latch is provided for that slot.

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