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ASUS ROG Crosshair X870E Extreme motherboard with Ryzen 9 9900X CPU installed, dark finish with large heatsinks and 5 inch LCD display

ASUS

ASUS ROG CROSSHAIR X870E EXTREME+ AMD motherboard with Ryzen 9 9900X

SKU CH-3Q74-WG9YD

E-ATX AMD motherboard with 20+2+2 power stages, 256 GB DDR5, five M.2 slots, 5G and 10G LAN, Wi-Fi 7, USB4 and a 5-inch LCD, bundled with a 12-core 24-thread Ryzen 9 9900X CPU

  • ProcessorSupports up to 8200+MT/s(OC) with Ryzen 9000 Series Processo
  • ChipsetAMD X870E
  • Form factorExtended ATX
  • CPU socketAM5
  • Memory slot count4 × 288pin (DDR5)
  • Max supported RAM256 GB

Model ROG CROSSHAIR X870E EXTREME

CPU +Ryzen 9 9900X

  • Ready for advanced AI workloads with high-speed connectivity
  • 12 cores and 24 threads at up to 5.6 GHz boost
  • 20+2+2 power stages rated at 110 A each
  • Three PCIe 5.0 M.2 slots plus two PCIe 4.0 M.2 slots
  • Dual 5 Gb and 10 Gb Ethernet with Wi-Fi 7

ASUS ROG X870E EXTREME+ with Ryzen 9 9900X combo

This product bundles an ASUS ROG CROSSHAIR X870E EXTREME+ motherboard with an AMD Ryzen 9 9900X processor. The board uses the AMD X870E chipset and AM5 socket. The CPU delivers 12 cores and 24 threads based on Zen 5 architecture with a 5.6 GHz max boost. It targets builders who want a matched high-end platform for advanced AI computing and heavy multitasking.

Suits enthusiasts building AI workstations

The combination provides 20+2+2 power stages rated at 110A, PCIe 5.0 support for graphics and storage, 10Gbps and 5Gbps Ethernet, Wi-Fi 7 and USB4 Type-C. Builders needing only mainstream performance or a smaller form factor should consider a less feature-dense board and a lower-tier processor.

256GB DDR5 limit across four 288-pin slots

The motherboard supports up to 256GB of DDR5 memory in a dual-channel configuration with AEMP and NitroPath DRAM Technology. This capacity ceiling determines whether the platform can handle the largest datasets and simulation workloads without paging to storage.

How it compares

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

Price $1,940.99
Pricier than about 95% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Product lineROG
Model nameROG CROSSHAIR X870E EXTREME+(R9 9900X)
Processor
ProcessorSupports up to
8200+MT/s(OC) with Ryzen 9000 Series Processors
8600+MT/s(OC) with Ryzen 8000 Series Processors
8000+MT/s(OC) with Ryzen 7000 Series Processors
CPU socketAM5
ChipsetAMD X870E
Memory
Memory slot count4 × 288pin (DDR5)
Max supported RAM256 GB
Memory channelsDual Channel
ECC supportNon-ECC
Storage
SATA ports4 x SATA 6Gb/s
M.2 slotsAMD Ryzen 9000 & 7000 Series Desktop Processors
M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 5.0 x4 mode)
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)*
M.2_3 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 5.0 x4 mode)**
AMD Ryzen 8000 Series Desktop Processors
M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)
M.2_2 slot (Key M), type 2242/2260/2280 (Not supports)
M.2_3 slot (Key M), type 2242/2260/2280/22110 (Not supports)
AMD X870E Chipset
DIMM.2_1 slot (Key M) via ROG Q-DIMM.2, type 2230/2242/2260/2280/22110 (su
SATA and RAID support0/1/5/10
Connectivity
Ethernet controller1 x Realtek 5Gb Ethernet
Second LAN controller1 x Marvell AQtion 10Gb Ethernet
Maximum network speed10 Gbit/s
Wi-Fi standardWi-Fi 802.11 be
Bluetooth support5.4
Power
Power connectors1 × 24-pin Main Power connector
2 × 8-pin +12 V CPU Power connector
1 × 8-pin PCIe Power connector
Size & build
Form factorExtended ATX
Width and length12.0 in × 10.9 in
Compatibility
Windows 11 supportSupported
More details
BIOS2 × 256 Mb Flash ROM, UEFI AMI BIOS

Other versions of this model

5 more in the same range

Questions about this item

Will the 5.6 GHz boost clock hold under an all-core load without manual tuning?

The board includes AI Overclocking, Dynamic OC Switcher and Core Flex, which adjust voltage and frequency automatically based on real-time telemetry.

Can I run four DDR5 modules at 8200 MT/s with the Ryzen 9 9900X installed?

The memory controller is rated for 8200+ MT/s OC with Ryzen 9000 series; four-slot stability at that speed depends on the specific kit and cooling.

Does the 3D VC heatsink cover every PCIe 5.0 M.2 slot or only the primary one?

The 3D vapor-chamber heatsink is fitted to one PCIe 5.0 M.2 slot; the other two PCIe 5.0 slots use separate substantial heatsinks.

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