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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
  • Number of Memory Slots4x288pin (DDR5)
  • Memory StandardDDR5 4400
  • Maximum Memory Supported192GB
  • Channel SupportedDual Channel
  • ECC SupportedYes
  • 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.

Points forts

  • 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

Caractéristiques

BrandASUS
ModelPRIME X870-P WIFI+R9 9900X3D
ChipsetAMD X870
Number of Memory Slots4x288pin (DDR5)
Memory StandardDDR5 4400
Maximum Memory Supported192GB
Channel SupportedDual Channel
ECC SupportedYes
Buffer SupportedUn-buffered
Memory FeatureSupports up to 8000+MT/s(OC) with Ryzen 9000 & 8000 & 7000 Series Processors
ECC and Non-ECC, Un-buffered DIMM*
Dual channel memory architecture
Supports AMD Extended Profiles for Overclocking (EXPO)
ASUS Enhanced Memory Profile (AEMP)
* Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
PCI Express 5.0 x16AMD Ryzen 9000 & 7000 Series Desktop Processors
1 x PCIe 5.0 x16 slot (supports x16 mode)
PCI Express 4.0 x16AMD Ryzen 8000 Series Desktop Processors
1 x PCIe 4.0 x16 slot (supports x8/x4 mode)
AMD X870 Chipset
3 x PCIe 4.0 x16 slots (support x1 mode)***
*** PCIEX16(G4)_1 shares bandwidth with M.2_2. PCIEX16(G4)_1 will be disabled when M.2_2 runs.
*** PCIEX16(G4)_2 and PCIEX16(G4)_3 share bandwidth with M.2_3. PCIEX16(G4)_2 and PCIEX16(G4)_3 will be disabled when M.2_3 runs.
Serial ATA (SATA)2 x SATA 6Gb/s
M.2AMD Ryzen 9000 & 7000 Series Desktop Processors
M.2_1 slot (Key M), type 2280 (supports PCIe 5.0 x4 mode)
AMD Ryzen 8000 Series Desktop Processors
M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
AMD X870 Chipset
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)**
M.2_3 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)***
M.2_4 slot (Key M), type 2280 (supports PCIe 3.0 x2 mode)****
** PCIEX16(G4)_1 shares bandwidth with M.2_2. PCIEX16(G4)_1 will be disabled when M.2_2 runs.
*** PCIEX16(G4)_2 and PCIEX16(G4)_3 share bandwidth with M.2_3. PCIEX16(G4)_2 and
SATA RAID* 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 ChipsetRealtek 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.
Audio Channels7.1 Channels
Max LAN Speed2.5Gbps
Wireless LANWi-Fi 802.11 be
BluetoothBluetooth 5.4
Back I/O Ports2 x USB4 (40Gbps) ports (2 x USB Type-C)
1 x USB 10Gbps port (1 x Type-A)
3 x USB 5Gbps ports (3 x Type-A)
4 x USB 2.0 ports (4 x Type-A)
1 x HDMI port
1 x Wi-Fi module
1 x Realtek 2.5Gb Ethernet port
3 x Audio jacks
1 x BIOS FlashBack button
Onboard USB1 x USB 10Gbps connector (supports USB Type-C)
1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
2 x USB 2.0 headers support 4 additional USB 2.0 ports
Other ConnectorsFan and Cooling Related
1 x 4-pin CPU Fan header
1 x 4-pin CPU OPT Fan header
1 x 4-pin AIO Pump header
4 x 4-pin Chassis Fan headers
Miscellaneous
3 x Addressable Gen2 headers
1 x Clear CMOS header
1 x COM Port header
1 x Front Panel Audio header (F_AUDIO)
1 x S/PDIF Out header
1 x SPI TPM header (14-1 pin)
1 x 10-1 pin System Panel header
Form FactorATX
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x 24-pin Main Power connector
2 x 8-pin +12V CPU Power connectors
BIOS Feature256 Mb Flash ROM, UEFI AMI BIOS
Windows 11Supported
FeaturesASUS 5X PROTECTION III
- DIGI+ VRM (- Digital power design with DrMOS)
- LANGuard
- Overvoltage protection
- SafeSlot
- Stainless-steel back I/O
ASUS Q-Design
- M.2 Q-Latch
- PCIe Slot Q-Release
- Q-Antenna
- Q-Dashboard
- Q-DIMM
- Q-LED Core
- Q-Slot
ASUS Thermal Solution
- Flexible M.2 heatsink
- VRM heatsink design
ASUS EZ DIY
- BIOS FlashBack button
- BIOS FlashBack LED
- ProCool
- Pre-mounted I/O shield
- SafeSlot
Aura Sync
- Addressable Gen2 headers
Package Contents1 x AMD Ryzen 9 9900X3D CPU
1 x Shin-Etsu X-23-7868-2D (1.8g)
Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x ASUS WiFi Q-Antenna
1 x M.2 rubber package
2 x Screw packages for M.2 SSD
Documentation
1 x Quick start guide

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Questions sur cet article

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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