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ATX motherboard with massive silver heatsinks and integrated I/O cover, CPU installed

ASUS

ASUS ROG Crosshair X870E APEX + Ryzen 9 9900X AMD motherboard

SKU CH-14J4-5FTVZ

AM5 motherboard with Ryzen 9 9900X, 12 cores, 24 threads, 5.6 GHz boost, 18+2+2 power stages, DDR5 to 9600 MT/s, Wi-Fi 7, three PCIe 5.0 M.2 slots, ROG Memory Fan and DIMM.2 card included

  • ProcessorAMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desk
  • ChipsetAMD X870E
  • Form factorATX
  • CPU socketAM5
  • Memory slot count2 × 288pin (DDR5)
  • Supported memory2 x DIMM slots, max. 128 GB, DDR5 Supports up to 8200+MT/s(O

Model ROG CROSSHAIR X870E APEX

CPU +Ryzen 9 9900X

  • 12 cores and 24 threads deliver heavy multi-thread throughput
  • 18+2+2 power stages rated to 110 A feed the CPU cleanly
  • DDR5 overclocking headroom reaches 9600+ MT/s with the bundled memory fan
  • Three PCIe 5.0 M.2 slots plus two PCIe 4.0 M.2 on the DIMM.2 card add high-speed storage
  • Wi-Fi 7 2x2 on 320 MHz channels enables up to 6.5 Gbps wireless throughput

AM5 Motherboard and CPU Combo

This bundle pairs an ASUS ROG Crosshair X870E APEX motherboard with an AMD Ryzen 9 9900X processor. The board uses the AMD X870E chipset and AM5 socket, supporting Ryzen 9000, 8000 and 7000 series CPUs. It delivers an 18+2+2 power stage design rated at 110A and 80A with ProCool II connectors. The included Ryzen 9 9900X provides 12 cores and 24 threads based on Zen 5 architecture with a 5.6 GHz max boost.

Overclockers and AI Builders

Enthusiasts chasing maximum DDR5 speeds will benefit from the two DIMM layout, ROG Memory Fan kit and AEMP support for 9600+ MT/s on Ryzen 8000 series. AI-focused builders gain AI Overclocking, AI Cooling II, AI Networking II and an AI Advisor for automated tuning. Users needing four memory slots or a wider range of PCIe slot configurations should consider alternative boards.

Bundled Cooling and Expansion Hardware

The ROG Memory Fan kit actively cools the two DDR5 modules to help sustain 9600+ MT/s overclocks. An ROG DIMM.2 card adds two extra PCIe 4.0 M.2 slots with dedicated heatsinks, supplementing the three onboard PCIe 5.0 M.2 slots. The integrated I/O cover and heatpipe-connected heatsinks manage VRM and M.2 thermals under heavy loads.

How it compares

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

Price $1,233.99
Pricier than about 91% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Product lineROG
Model nameROG CROSSHAIR X870E APEX +(R9 9900X)
Part numberROG CROSSHAIR X870E APEX +(R9 9900X)
Processor
ProcessorAMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors*
* Refer to https://www.asus.com/support/download-center/ for CPU support list.
CPU socketAM5
ChipsetAMD X870E
Memory
Memory slot count2 × 288pin (DDR5)
Supported memory2 x DIMM slots, max. 128 GB, DDR5
Supports up to
8200+MT/s(OC) with Ryzen™ 9000 Series Processors,
9600+MT/s(OC) with Ryzen™ 8000 Series Processors
8000+MT/s(OC) with Ryzen™ 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)
* Supported memory types, data rate (speed), and number of DRAM modules vary depending on the CPU and memory configuration, for more information please refer to CPU/Memory Support list under the Support tab of product information sit
Max supported RAM128 GB
ECC supportNon-ECC
Storage
SATA ports4 x SATA 6Gb/s
M.2 slotsSupports 5 x M.2 slots and 4 x SATA 6Gb/s ports*
AMD Ryzen™ 9000 & 7000 Series Desktop Processors***
M.2_1 slot (Key M), type 2242/2260/2280 (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 (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)
M.2_3 slot (Key M), type 2242/2260/2280 (Not supports)
AMD X870E Chipset
DIMM.2_1 slot (Key M), type 2230/2242/2260/2280
SATA and RAID support0/1/5/10
Audio & video
Sound channelsROG SupremeFX 7.1 Surround Sound High Definition Audio CODEC ALC4080*
- 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
- Savitech SV3H712 AMP
- Gold-plated audio jacks
- Rear optical S/PDIF out port
- Premium audio capacitors
- Audio cover
* A chassis with an HD audio module in the front panel is required to support 7.1 Su
Connectivity
Second LAN controller1 x Realtek 5Gb Ethernet
ASUS LANGuard
Maximum network speed5 Gbit/s
Bluetooth supportYes
Ports & slots
PCIe 4.0 x16 slotsAMD Ryzen™ 8700 & 8600 & 8400 Series Desktop Processors*
2 x PCIe 4.0 x16 slots with Q-Release Slim (only supports PCIEx16_1 & total bandwidth for x8, PCIEx16_2 will be disabled)
AMD Ryzen™ 8500 & 8300 Series Desktop Processors*
2 x PCIe 4.0 x16 slots with Q-Release Slim (only supports PCIEx16_1 & total bandwidth for x4, PCIEx16_2 will be disabled)
AMD X870E Chipset
1 x PCIe 4.0 x4 slot
1 x PCIe 3.0 x1 slot
* Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/).
- To ensure compatibility of the device installed, please refer to https
Rear panel ports2 x USB4® (40 Gbit/s) ports (2 x USB Type-C®)
6 x USB 10 Gbit/s ports (5 x Type-A + 1 x USB Type-C®)
2 x USB 5 Gbit/s ports (2 x Type-A)
1 x Wi-Fi module
1 x Realtek 5Gb Ethernet port
1 x PS/2 keyboard/mouse combo port
2 x Gold-plated audio jacks
1 x Optical S/PDIF out port
1 x BIOS FlashBack™ button
1 x Clear CMOS button
Size & build
Form factorATX
Width and length12 in × 9.6 in ( 30.5 cm × 24.4 cm )
Compatibility
Windows 11 supportSupported

Other versions of this model

5 more in the same range

Questions about this item

Will the board fit a standard ATX case and clear tall CPU coolers?

The board uses the ATX form factor. Its massive heatsinks and integrated I/O cover extend across the top edge, so check your cooler’s height and side clearance against the case specifications before buying.

Can I run four sticks of DDR5 or only two?

The board has two 288-pin DDR5 slots and supports up to 128 GB total. Four-stick kits are not supported on this model.

What M.2 drive lengths and speeds are supported directly on the board?

Three onboard M.2 slots accept 2242, 2260 and 2280 drives. The primary slot runs at PCIe 5.0 x4, while the other two run at PCIe 4.0 x4.

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