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Dark ATX motherboard with large heatsinks and CPU installed

ASUS

ASUS ROG Crosshair X870E Dark Hero AMD motherboard & Ryzen 9 9900X3D CPU Combo

SKU CH-7QHA-AB184

AM5 motherboard paired with a 16-core 3D V-Cache CPU, DDR5 support up to 9600 MT/s, dual USB4 and 10 Gb Ethernet

  • CPU socketAM5
  • ChipsetAMD X870E
  • Form factorATX
  • Memory slot count4 × 288pin (DDR5)
  • Supported memorySupports up to 8600+MT/s(OC)/8200+MT/s(OC) with Ryzen 9000 S
  • Max supported RAM256 GB

Model ROG CROSSHAIR X870E DARK HERO

CPU +Ryzen 9 9900X3D

  • AM5 socket supports Ryzen 9000, 8000 and 7000 series processors
  • DDR5 memory scales to 9600 MT/s over four slots with 256 GB maximum capacity
  • 3D vapour-chamber heatsink cools one PCIe 5.0 M.2 slot alongside massive VRM heatsinks linked by an L-shaped heatpipe
  • Dual USB4 Type-C ports deliver 40 Gbps bandwidth alongside two 10 Gbps and one 5 Gbps Ethernet connections
  • 22 power stages rated at 110 A each with ProCool II connectors and MicroFine alloy chokes provide stable overclocking headroom

AM5 socket with Ryzen 9 9900X3D

This bundle pairs the ROG Crosshair X870E Dark Hero motherboard with the Ryzen 9 9900X3D processor on the AM5 platform. It targets builders who want a pre-validated CPU and board combination for high-end desktop workloads. The board delivers four DDR5 slots, five M.2 sockets and dual USB4 ports. The 3D V-Cache CPU excels in gaming and cache-sensitive applications.

Ideal for AI workstations and high-refresh gaming

The combo suits users who need 256 GB memory capacity, 10 Gbps and 5 Gbps Ethernet, Wi-Fi 802.11 be and Bluetooth 5.4 in one package. AI Cache Boost, AI Overclocking and AI Cooling II simplify tuning for machine-learning tasks. Builders who only need PCIe 4.0 storage, slower LAN or fewer USB4 ports should consider less feature-dense platforms.

Dual USB4 40 Gbps Type-C ports

Two rear USB4 ports provide 40 Gbps bandwidth each for external GPUs, high-speed storage or dock chains. This interface count is the deciding factor for creators who move large datasets between devices daily. If your workflow relies on single 10 Gbps or 20 Gbps connections instead, a board with fewer USB4 ports will cost less.

How it compares

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

Price $1,593.99
Pricier than about 93% of the 1,906 comparable items (median $224.49).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameASUS
Model nameROG CROSSHAIR X870E DARK HERO +(R9 9900 × 3D)
Processor
CPU socketAM5
ChipsetAMD X870E
Memory
Memory slot count4 × 288pin (DDR5)
Supported memorySupports up to
8600+MT/s(OC)/8200+MT/s(OC) with Ryzen 9000 Series Processors
9600+MT/s(OC)/9200+MT/s(OC) with Ryzen 8000 Series Processors
8000+MT/s(OC)/8000+MT/s(OC) with Ryzen 7000 Series Processors
Max supported RAM256 GB
Memory channelsDual Channel
ECC supportYes
BufferingUn-buffered
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)**
AMD Ryzen 8000 Series Desktop Processors
M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
M.2_2 slot (Key M), type 2242/2260/2280 (Not supports)
AMD X870E Chipset
M.2_3 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
M.2_4 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
M.2_5 slot (Key M), type 2230 (supports PCIe 4.0 x2 mode)
*When both PCIEX16_1 a
SATA and RAID supportAMD RAIDXpert2 Technology
Ryzen 9000 & 8000 & 7000 Series Processors: RAID 0/1/5/10
Audio & video
Sound channelsROG SupremeFX 7.1 Surround Sound High Definition Audio CODEC ALC4082*
- Impedance sense for front and rear headphone outputs
- Supports: Jack-detection, Multi-streaming, Front Panel MIC Jack-retasking
- High quality 120 dB SNR stereo playback output and 110 dB SNR recording input
- Supports up to 32-Bit/384 kHz playback on front panel
Audio Features
- SupremeFX Shielding Technology
- ESS ES9219 QUAD DAC
- Gold-plated audio jacks
- Rear optical S/PDIF out port
- Premium audio capacitors
* A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound au
Connectivity
Maximum network speed10 Gbit/s + 5 Gbit/s
Wi-Fi standardWi-Fi 802.11 be
Bluetooth support5.4
Ports & slots
Onboard USB headers2 x USB 20 Gbit/s connectors (support USB Type-C)
2 x USB 5 Gbit/s headers support 4 additional USB 5 Gbit/s ports
3 x USB 2.0 headers support 6 additional USB 2.0 ports
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 factorATX
Width and length12.0 in × 9.6 in
More details
BIOS64 MB (512Mb)
Flash ROM, UEFI AMI BIOS

Other versions of this model

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Questions about this item

What speed does the USB4 interface on this board reach in practice?

The two USB4 Type-C ports on the rear I/O run at 40Gbps each.

What physical clearance does the 3D VC M.2 heatsink require?

The 3D vapor-chamber heatsink covers one PCIe 5.0 M.2 slot and sits under the I/O cover; ensure your case allows the motherboard’s full ATX height and that no cable or bracket presses on the heatsink fins.

How is the CPU installed, and which step do builders often miss?

Lift the AM5 socket lever, align the Ryzen 9 9900X3D triangle marker with the socket corner, place the chip gently without force, lower the lever until it clicks, then attach the cooler — the step many skip is removing the protective plastic cover from the socket before seating the processor.

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