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White extended ATX motherboard with silver heatsinks and CPU installed

ASUS

ASUS ROG Crosshair X870E Glacial AMD motherboard & Ryzen 9 9900X CPU Combo

SKU CH-BY20-G19YQ

AM5 motherboard bundled with a Ryzen 9 9900X CPU, supporting DDR5 up to 8600 MT/s, 256 GB capacity, dual 10 Gb Ethernet, Wi-Fi 802.11 be, Bluetooth 5.4 and dual USB4 ports

  • CPU socketAM5
  • ChipsetAMD X870E
  • Form factorExtended ATX
  • 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 GLACIAL

CPU +Ryzen 9 9900X

  • Ready for advanced AI workloads with power and connectivity built for demanding AI applications
  • Supports DDR5 memory up to 9600 MT/s overclocked for Ryzen 8000 series processors
  • 24 plus 2 plus 2 power stages rated at 110 A each deliver robust power for overclocking
  • Dual 10 Gbps LAN, Wi-Fi 802.11 be and Bluetooth 5.4 provide high-speed wired and wireless connectivity
  • 3D vapour-chamber M.2 heatsink cools one PCIe 5.0 slot while massive heatsinks and dual heatpipes cover VRM and I/O

Combo for AM5 builds

This bundle pairs the ROG Crosshair X870E Glacial motherboard with a Ryzen 9 9900X processor. The AM5 socket supports Ryzen 9000, 8000 and 7000 series CPUs. Four DDR5 slots accept up to 256GB of memory. It targets enthusiasts building high-performance AI-ready desktops.

Extended ATX board with robust power and cooling

The board uses 24 plus 2 plus 2 power stages rated at 110A each with ProCool II connectors, MicroFine alloy chokes and metallic capacitors. A 3D vapour-chamber heatsink covers one PCIe 5.0 M.2 slot. Massive heatsinks integrate with the I/O cover and connect via two L-shaped heatpipes. ROG Memory Q-Fan adds active airflow over the DIMMs.

DDR5 up to 9600 MT/s with Ryzen 8000 series

Memory frequency support varies by CPU generation: up to 8600 MT/s with Ryzen 9000, up to 9600 MT/s with Ryzen 8000 and up to 8000 MT/s with Ryzen 7000. Dual-channel operation and ECC are supported. This spec determines the memory kit you should buy for maximum throughput.

How it compares

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

Price $2,499.99
Pricier than about 99% 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 GLACIAL+(R9 9900X)
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)**
Hyper M.2_1 slot (Key M) via ROG Hyper M.2 card, type 2230/2242/2260/2280/22110 (suppports PCIe 5.0 x4 mode)
Hyper M.2_2 slot (Key M) via ROG Hyper M.2 card, type 2230/2242/2260/2280/22110 (suppports PCIe 5.0 x4 mode)
AMD Ryzen 8700 & 8600 & 8400 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 (supports PCIe
SATA and RAID supportAMD RAIDXpert2 Technology
Ryzen 9000 & 8000 & 7000 Series Processors: RAID 0/1/5/10*
* SATA ports from ASM1162 cannot support RAID
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
- LED-illuminated audio jacks
- Rear optical S/PDIF out port
- Premium audio capacitors
Supports LHDC, high-definition bluetooth audio codec, transmission with up to 400 kbit/s bitrate
Connectivity
Maximum network speed2 × 10 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*
2 x PCIe 5.0 x16 slots with PCIe Q-Release Switch (supports x16 or x8/x8 or x8/x4/x4 or x4/x4/x4/x4 modes)**
AMD Ryzen 8700 & 8600 & 8400 Series Desktop Processors*
2 x PCIe 4.0 x16 slots with PCIe Q-Release Switch (only supports PCIEx16(G5)_1 & total bandwidth for x8, PCIEx16(G5)_2 will run at PCIe 3.0 x4)
AMD Ryzen 8500 & 8300 Series Desktop Processors*
2 x PCIe 4.0 x16 slots with PCIe Q-Release Switch (only supports PCIEx16(G5)_1 & total bandwidth for x4, PCIEx16(G5)_2 will run at PCIe 3.0 x4)
* Specifications vary by CPU types.
**
Onboard USB headers2 x USB 20 Gbit/s connector (supports 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 factorExtended ATX
Width and length12.0 in × 10.9 in
More details
BIOS2 × 512 Mb Flash ROM, UEFI AMI BIOS

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Questions about this item

What PCI Express generation and lane configuration does the board provide for graphics cards?

The board offers two PCIe 5.0 x16 slots that can run at x16 or split to x8/x8, x8/x4/x4 or x4/x4/x4/x4 depending on the installed CPU.

What case clearance and power connectors are required for the extended ATX board?

An extended ATX case is needed; the board uses ProCool II connectors fed by 24 plus 2 plus 2 power stages rated at 110A each.

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

Lift the retention lever, align the triangle on the CPU with the socket marker, lower the lever fully, then attach the cooler — many builders forget to remove the protective plastic cover on the socket before seating the processor.

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