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ASUS

ASUS ROG Crosshair X870E Extreme AMD motherboard & Ryzen 9 9950X CPU combo

SKU CH-E7ZB-R408H

A motherboard and CPU bundle with a 16-core Ryzen 9 9950X, DDR5 support up to 256 GB, three PCIe 5.0 M.2 slots, 5G and 10G LAN, Wi-Fi 7, and a 20+2+2 phase power design

  • ProcessorSupports up to 8200+MT/s(OC) with Ryzen 9000 Series Processo
  • ChipsetAMD X870E
  • Form factorExtended ATX
  • CPU socketAM5
  • Memory slot count4 × 288pin (DDR5)
  • Max supported RAM256 GB
  • Ready for demanding AI workloads with high power and connectivity
  • 16 cores and 32 threads on Zen 5 architecture boost up to 5.7 GHz
  • Robust 20+2+2 power stages rated at 110 A with ProCool II connectors
  • Five M.2 slots including three PCIe 5.0 and two PCIe 4.0 with substantial cooling
  • Dual high-speed LAN with Realtek 5 GbE and Marvell 10 GbE plus Wi-Fi 7

Ready-built AM5 platform

This bundle pairs the ROG Crosshair X870E Extreme motherboard with a Ryzen 9 9950X processor. The board uses the AMD X870E chipset and AM5 socket, supporting Ryzen 9000, 8000 and 7000 series CPUs. It delivers four DDR5 slots for up to 256GB of memory in dual-channel mode. The combination targets builders who want a single validated kit for high-end workstations or enthusiast gaming rigs.

16-core Zen 5 processor

The included Ryzen 9 9950X runs 16 cores and 32 threads on the Zen 5 architecture. It reaches a 5.7 GHz maximum boost clock and is unlocked for overclocking. Cache totals 64MB L3 plus 16MB L2. This CPU specification is the primary factor that decides whether the bundle matches a workload needing heavy multi-threaded throughput.

Suits AI development and heavy rendering

The platform fits developers training local models, content creators rendering complex scenes, and enthusiasts chasing maximum multi-core speed. Buyers who only need mainstream gaming performance or a smaller form factor should consider a less extensive AM5 board and a lower-core-count Ryzen CPU instead.

How it compares

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

Price $2,179.99
Pricier than about 97% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Product lineROG
Model nameROG CROSSHAIR X870E EXTREME+(R9 9950X)
Processor
ProcessorSupports up to
8200+MT/s(OC) with Ryzen 9000 Series Processors
8600+MT/s(OC) with Ryzen 8000 Series Processors
8000+MT/s(OC) with Ryzen 7000 Series Processors
CPU socketAM5
ChipsetAMD X870E
Memory
Memory slot count4 × 288pin (DDR5)
Max supported RAM256 GB
Memory channelsDual Channel
ECC supportNon-ECC
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)*
M.2_3 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 5.0 x4 mode)**
AMD Ryzen 8000 Series Desktop Processors
M.2_1 slot (Key M), type 2242/2260/2280/22110 (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 2242/2260/2280/22110 (Not supports)
AMD X870E Chipset
DIMM.2_1 slot (Key M) via ROG Q-DIMM.2, type 2230/2242/2260/2280/22110 (su
SATA and RAID support0/1/5/10
Connectivity
Ethernet controller1 x Realtek 5Gb Ethernet
Second LAN controller1 x Marvell AQtion 10Gb Ethernet
Maximum network speed10 Gbit/s
Wi-Fi standardWi-Fi 802.11 be
Bluetooth support5.4
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
Compatibility
Windows 11 supportSupported
More details
BIOS2 × 256 Mb Flash ROM, UEFI AMI BIOS

Other versions of this model

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Questions about this item

What does the 5.7 GHz max boost on the Ryzen 9 9950X mean for single-threaded workloads in a built system?

The 16-core CPU can reach 5.7 GHz on a single core when thermal and power headroom allow, giving snappy response in lightly threaded tasks while the unlocked multiplier lets enthusiasts push frequencies higher with adequate cooling.

How does the PCIe 5.0 x16 slot arrangement limit GPU bandwidth when both top slots are populated?

With Ryzen 9000 or 7000 series the first slot runs at x16 or drops to x8/x8 when the second slot is used; with Ryzen 8700/8600/8400 the second slot is disabled and the first runs at x8 total bandwidth.

What clearance does the 5-inch LCD and integrated I/O heatsink require from the case side panel and CPU cooler?

The E-ATX board needs a chassis that accepts the form factor; the LCD sits on the I/O cover so the side panel must clear it, and the massive VRM heatsinks with heatpipes demand a CPU cooler that does not overhang the top-edge mounting zone.

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