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ASUS

ASUS ROG CROSSHAIR X870E APEX AMD motherboard & Ryzen 9 9950X CPU combo

SKU CH-X2Y6-9AZ99

A combo pairing an AM5 motherboard with a 16-core 32-thread Ryzen 9 9950X CPU, 18+2+2 power stages, DDR5 to 9600 MT/s, three PCIe 5.0 M.2 slots, Wi-Fi 7 and 5 Gb Ethernet

  • CPU Socket TypeAM5
  • CPU TypeAMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desk
  • ChipsetAMD X870E
  • Number of Memory Slots2x288pin (DDR5)
  • Memory Standard2 x DIMM slots, max. 128GB, DDR5 Supports up to 8200+MT/s(OC
  • Maximum Memory Supported128GB
  • 16 cores and 32 threads handle heavy workloads with the Ryzen 9 9950X
  • 7 GHz max boost clock accelerates single-threaded tasks on the Ryzen 9 9950X
  • 18+2+2 power stages rated at 110 A and 80 A deliver stable current to the CPU
  • DDR5 memory overclocks to 9600+ MT/s with the included ROG Memory Fan kit
  • Wi-Fi 7 with 320 MHz bandwidth enables up to 6.5 Gbps wireless throughput

Combo purpose

The ASUS ROG CROSSHAIR X870E APEX motherboard paired with the AMD Ryzen 9 9950X CPU targets enthusiasts who want a single validated kit for extreme overclocking and heavy multithreaded workloads. The board uses the AMD X870E chipset and AM5 socket, while the processor delivers 16 cores and 32 threads based on the Zen 5 architecture with a 5.7 GHz max boost clock. Together they provide a platform ready for advanced AI computing tasks and high-frequency DDR5 memory.

Upgrade path

This combo replaces an older AM4 or early AM5 system when the workload demands 16 cores, 32 threads and memory speeds beyond 8000 MT/s. The jump is worth it if you need PCIe 5.0 x16 graphics bandwidth, three onboard PCIe 5.0 M.2 slots plus two PCIe 4.0 M.2 slots on the included ROG DIMM.2 card, and the 18+2+2 power stage design rated at 110A and 80A per stage. AI Overclocking, Dynamic OC Switcher and Core Flex features simplify pushing the 9950X beyond stock limits.

Interface limits

The AM5 socket supports Ryzen 9000, 8000 and 7000 series processors, but PCIe 5.0 x16 graphics lanes are only active with 9000 and 7000 series CPUs; 8000 series chips drop to PCIe 4.0 x16 and disable the second x16 slot. DDR5 memory tops out at 8200+ MT/s with 9000 series, 9600+ MT/s with 8000 series and 8000+ MT/s with 7000 series, all requiring overclocking. Wi-Fi 7 operates on 2.4, 5 and 6 GHz bands with 320 MHz channel width for up to 6.5 Gbps throughput, while the second LAN controller provides 5 Gbps wired Ethernet.

Highlights

  • 16 cores and 32 threads handle heavy workloads with the Ryzen 9 9950X
  • 7 GHz max boost clock accelerates single-threaded tasks on the Ryzen 9 9950X
  • 18+2+2 power stages rated at 110 A and 80 A deliver stable current to the CPU
  • DDR5 memory overclocks to 9600+ MT/s with the included ROG Memory Fan kit
  • Wi-Fi 7 with 320 MHz bandwidth enables up to 6.5 Gbps wireless throughput

Specifications

BrandASUS
SeriesROG
ModelROG CROSSHAIR X870E APEX +(R9 9950X)
Part NumberROG CROSSHAIR X870E APEX +(R9 9950X)
CPU Socket TypeAM5
CPU TypeAMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors*
* Refer to https://www.asus.com/support/download-center/ for CPU support list.
ChipsetAMD X870E
Number of Memory Slots2x288pin (DDR5)
Memory Standard2 x DIMM slots, max. 128GB, 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
Maximum Memory Supported128GB
ECC SupportedNon-ECC
PCI Express 5.0 x16AMD Ryzen™ 9000 & 7000 Series Desktop Processors*
2 x PCIe 5.0 x16 slots with Q-Release Slim (supports x16 or x8/x8** or x8/x4/x4 modes***)
** When you use both PCIEX16_1 and PCIEX16_2, PCIEX16_1 and PCIEX16_2 will run x8.
***When M.2_3 are enabled, PCIEX16_1 will run x8, and PCIEX16_2 will run x4.
**** When M.2_2 and M.2_3 are enabled simultaneously, PCIEX16_2 will be disabled.
PCI Express 4.0 x16AMD 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
Serial ATA (SATA)4 x SATA 6Gb/s
M.2Supports 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 RAID0/1/5/10
Audio 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
Second LAN Chipset1 x Realtek 5Gb Ethernet
ASUS LANGuard
Max LAN Speed5Gbps
Wireless LANWi-Fi 7*
2x2 Wi-Fi 7 (802.11be)
Supports 2.4/5/6GHz frequency band**
Supports Wi-Fi 7 320MHz bandwidth, up to 6.5Gbps transfer rate.
Bluetooth® v5.4***
*Wi-Fi features may vary depending on the operating system
For Windows 11, Wi-Fi 7 will require 24H2 or later version for full functions, Windows 11 21H2/22H2/23H2 only support Wi-Fi 6E.
For Windows 10, please note that no driver is available, refer to the Wi-Fi chipset vendor's website for details.
** Wi-Fi 6GHz frequency band and bandwidth regulatory may vary between countries.
*** The Bluetooth® version may vary, please refer to th
BluetoothYes
Back I/O Ports2 x USB4® (40Gbps) ports (2 x USB Type-C®)
6 x USB 10Gbps ports (5 x Type-A + 1 x USB Type-C®)
2 x USB 5Gbps 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
Other ConnectorsFan and Cooling Related
1 x 4-pin CPU Fan header
1 x 4-pin CPU OPT Fan header
1 x 4-pin AIO Pump header
2 x 4-pin Chassis Fan headers
2 x 4-pin Full Speed Fan headers
1 x W_PUMP+ header
1 x Extra Flow Fan header
Power Related
1 x 24-pin Main Power connector
2 x 8-pin +12V CPU Power connectors
1 x 8-pin PCIe Power connector
Storage Related
3 x M.2 slots (Key M)
4 x SATA 6Gb/s ports
USB
2 x USB 20Gbps connectors (support USB Type-C® )
2 x USB 5Gbps headers support 4 additional USB 5Gbps ports
2 x USB 2.0 headers support 4 additional USB 2.0 ports
Miscellaneous
1 x 80 Light Bar jumper
3
Form FactorATX
Dimensions (W x L)12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )
Windows 11Supported

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Questions about this item

What clearance does the ROG Memory Fan kit need above the two DDR5 DIMM slots?

The kit mounts directly on the two 288-pin DDR5 slots; allow enough vertical space in your case for the fan assembly to sit above the memory modules without touching the side panel.

Which power connectors must be seated for the 18+2+2 phase VRM to deliver full current to the Ryzen 9 9950X?

Both ProCool II 8-pin CPU power connectors must be fully inserted; the board will not enable the 110 A and 80 A power stages if either connector is loose or missing.

When should the thermal pads on the three onboard PCIe 5.0 M.2 heatsinks and the DIMM.2 card be replaced?

Replace the pads if they become compressed, torn, or lose tackiness — typically after several cooler remounts or when M.2 drive temperatures rise noticeably under sustained load.

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