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Black ATX motherboard with massive silver heatsinks, integrated I/O shield and a bundled Ryzen 9 9900X3D CPU

ASUS

ASUS ROG CROSSHAIR X870E APEX AMD motherboard & Ryzen 9 9900X3D CPU combo

SKU CH-YFWY-88C88

AM5 motherboard and 12-core Zen 5 CPU with 128 MB L3 cache, DDR5 up to 9600 MT/s, three PCIe 5.0 M.2 slots, Wi-Fi 7 and 5 Gb Ethernet

  • 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 9900X3D

  • 12-core CPU with 128 MB L3 cache for heavy workloads
  • 18+2+2 power stages rated 110 A and 80 A for stable overclocking
  • DDR5 up to 9600 MT/s supported with included ROG Memory Fan
  • Three onboard PCIe 5.0 M.2 slots plus two PCIe 4.0 slots on DIMM.2 card
  • Wi-Fi 7 2x2 320 MHz and 5 Gb Ethernet for high-speed networking

Combo for AM5 builders

This bundle pairs the ROG CROSSHAIR X870E APEX motherboard with an AMD Ryzen 9 9900X3D processor. The board uses the AMD X870E chipset and an AM5 socket that supports Ryzen 9000, 8000 and 7000 series CPUs. It targets enthusiasts who want a pre-matched platform for high-frequency DDR5 and AI workloads. The CPU delivers 12 cores with 128 MB L3 cache and integrated AMD Radeon graphics.

Installation notes

The motherboard fits standard ATX mounting points and uses ProCool II power connectors that seat with a firm click. Two DIMM slots simplify memory routing but require care when inserting modules at 8200 MT/s or higher. The ROG DIMM.2 card installs in a PCIe slot and adds two extra M.2 drives; verify clearance against large CPU coolers. Q-Release Slim buttons release graphics cards without tools, reducing the risk of damaged retention tabs.

Compatibility checklist

Confirm your power supply provides at least two 8-pin EPS cables for the 18+2+2 stage VRM. The chassis must accommodate an ATX board with tall heatsinks and an integrated I/O cover. Memory kits should be on the ASUS QVL for 8200+ MT/s operation with Ryzen 9000 series. For Wi-Fi 7 320 MHz channels, ensure your regulator region permits the 6 GHz band and that antenna mounts are accessible at the rear panel.

How it compares

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

Price $1,466.99
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
Product lineROG
Model nameROG CROSSHAIR X870E APEX +(R9 9900 × 3D)
Part numberROG CROSSHAIR X870E APEX +(R9 9900 × 3D)
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

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Questions about this item

How can I verify the ROG CROSSHAIR X870E APEX is working correctly after installing the Ryzen 9 9900X3D?

The board posts and shows the CPU detected in BIOS. AI Overclocking and AI Cooling II apply optimized settings automatically. The ROG Memory Fan spins when DDR5 modules exceed thermal thresholds. Check that all 18+2+2 power stages report normal voltages and the 5 Gb Ethernet link lights are active.

What ships in the combo box and what must I purchase separately?

The combo includes the ROG CROSSHAIR X870E APEX motherboard and the Ryzen 9 9900X3D processor. The box also contains the ROG DIMM.2 card for two extra M.2 drives and the ROG Memory Fan kit. You must buy DDR5 memory modules, M.2 SSDs, a graphics card, a power supply, a CPU cooler and a chassis separately.

Which memory speed tier should I target with the Ryzen 9 9900X3D on this board?

With the Ryzen 9000 series CPU installed, the motherboard supports DDR5 up to 8200+ MT/s when overclocked. The ROG Memory Fan and AEMP profiles help stabilize high-frequency kits. Choose a DDR5 kit rated at or near 8200 MT/s for maximum headroom, or a lower-speed kit if you prefer plug-and-play stability.

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