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ATX motherboard with large silver VRM heatsink, four DDR5 slots, dual M.2 heatsinks, rear I/O shield, Ryzen 9 9900X CPU in socket

ASUS

ASUS PRIME X870-P WIFI + Ryzen 9 9900X AMD motherboard & CPU combo

SKU CH-50CJ-D45P4

Pairs an AMD X870 motherboard with a 12-core Ryzen 9 9900X, DDR5 to 192 GB, Wi-Fi 7, 2.5 Gb LAN and PCIe 5.0 slots

  • 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 9900X

  • 12 cores and 24 threads handle heavy workloads with the 5.6 GHz max boost
  • 14+2+1 80A DrMOS power stages on an 8-layer PCB deliver stable voltage for overclocking
  • DDR5 memory scales to 8000+ MT/s across four slots with a 192 GB ceiling
  • Wi-Fi 7 and 2.5 Gb Ethernet plus USB4 40 Gbps ports keep data moving fast
  • Q-Release PCIe slot, M.2 Q-Latch and pre-mounted I/O shield simplify the build

Combo ready for AI workloads

This bundle pairs an ASUS PRIME X870-P WIFI motherboard with a Ryzen 9 9900X processor. The CPU delivers 12 cores and 24 threads built on the Zen 5 architecture, reaching a 5.6 GHz max boost clock. It targets enthusiasts building advanced AI PCs or high-end workstations on the AM5 platform. The combination unlocks PCIe 5.0 support for both graphics and storage.

Power delivery and DIY layout

The board uses 14+2+1 80A DrMOS power stages on an 8-layer PCB with ProCool connectors, alloy chokes and durable capacitors. A large VRM heatsink, dual M.2 heatsinks and a PCH heatsink handle thermals. Pre-mounted I/O shield, Q-Antenna, PCIe Slot Q-Release and M.2 Q-Latch simplify assembly. BIOS FlashBack, Q-Dashboard and Q-LED Core aid troubleshooting.

Connectivity bundle and software control

Wi-Fi 7, Bluetooth 5.4 and 2.5Gb Ethernet provide modern wireless and wired links. Rear USB4 40Gbps Type-C, front USB 10Gbps Type-C and rear USB 10Gbps Type-A ports cover high-speed peripherals. Fan Xpert 4 with AI Cooling II manages hybrid fan headers. Realtek 7.1 audio with shielding supports 24-bit/192 kHz playback.

How it compares

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

Price $775.99
Pricier than about 77% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Model namePRIME X870-P WIFI+R9 9900X
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

What PCIe 5.0 x16 speed does the board deliver with the included Ryzen 9 9900X?

The board provides one PCIe 5.0 x16 slot running at full x16 bandwidth when paired with the Ryzen 9 9900X processor.

What physical clearance is needed for the VRM and M.2 heatsinks on this ATX board?

The board includes a large VRM heatsink and dual M.2 heatsinks, so the case must accommodate standard ATX height and allow airflow over those heatsinks.

How is the Ryzen 9 9900X installed in the AM5 socket, and what step is often missed?

Lift the socket lever, align the CPU triangle with the socket marker, place the chip gently, lower the lever, then remove the protective plastic cover from the CPU heatspreader before mounting the cooler.

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