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Rectangular CEB workstation motherboard, dark grey PCB with silver heatsinks and black slots

ASUS

ASUS Pro WS W790-ACE Intel motherboard

SKU CH-ME40-T9MRW MPN Pro WS W790-ACE

CEB workstation board for Intel Xeon W-3400 and W-2400 processors with LGA 4677 socket, quad-channel DDR5 up to 2TB ECC, five PCIe 5.0 x16 slots, dual 10G and 2.5G LAN.

  • ProcessorSupport Intel Xeon W-3400 and W-2400
  • ChipsetIntel W790
  • Form factorCEB
  • CPU socketLGA 4677
  • Memory slot count8 × 288pin (DDR5)
  • Supported memorySupport up to DDR5 6800(OC)
  • Ready for Xeon W-3400 and W-2400 CPUs with LGA 4677 socket
  • 12+1+1 power stages deliver stable voltage for 24/7 workloads
  • Five PCIe 5.0 x16 slots support multi-GPU and high-speed add-in cards
  • Dual 10G and 2.5G LAN ports plus front and rear USB 3.2 Gen 2x2 Type-C
  • Server-grade IPMI remote management with ASUS Control Center Express software

Workstation board for Xeon W-3400 and W-2400

The ASUS Pro WS W790-ACE is a CEB workstation motherboard built around the Intel W790 chipset and LGA 4677 socket. It targets professionals who need reliable 24/7 operation with up to 2TB of ECC DDR5 memory across eight 288-pin slots running in quad-channel mode.

Sustained load with 12+1+1 power stages

A 12+1+1 power-stage design feeds the CPU through an 8-pin PCIe connector while massive VRM, chipset and M.2 heatsinks dissipate heat during long render or compute sessions. Five PCIe 5.0 x16 slots maintain x16, x16, x16, x0/x8 or x16/x8 bandwidth configurations so multiple GPUs or accelerators keep full throughput without throttling.

Straightforward install if the case fits CEB

The board follows the CEB form factor so a compatible chassis is required; standard ATX holes will not align. Front and rear USB 3.2 Gen 2x2 Type-C headers are clearly labelled, and the two M.2 slots (2242/2260/2280/22110 and 2280) use tool-free latches. SlimSAS cables for the three SlimSAS ports are not included and must be sourced separately.

How it compares

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

Price $757.99
Pricier than about 92% of the 2,965 comparable items (median $97.99).

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 namePro WS W790-ACE
Part number90MB1C70-M0AAY0
Processor
ProcessorSupport Intel Xeon W-3400 and W-2400
CPU socketLGA 4677
ChipsetIntel W790
Memory
Memory slot count8 × 288pin (DDR5)
Supported memorySupport up to DDR5 6800(OC)
Max supported RAM2 TB
Memory channelsQuad Channel
Memory profilesIntel XMP 3.0
ECC supportYes
Storage
M.2 slotsIntel W790 Chipset
M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 mode)
M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
SATA and RAID support0/1/5/10
Audio & video
Audio chipRealtek S1220A 7.1 Surround Sound High Definition Audio CODEC*
- Impedance sense for front and rear headphone outputs
- Internal audio Amplifier to enhance the highest quality sound for headphone and speakers
- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
- High quality 120 dB SNR stereo playback output and 113 dB SNR recording input (Line-in)
- Supports up to 32-Bit/192 kHz playback*
Audio Features
- Power pre-regulator reduces power input noise to ensure consistent performance
- Rear optical S/PDIF out port
- Premium audio capacitors
- Dedicated audio PCB l
Sound channels7.1 Channels
Connectivity
Ethernet controller1 x Marvell AQtion 10Gb Ethernet
1 x Intel 2.5Gb Ethernet
ASUS LANGuard
Maximum network speed10 Gbit/s + 2.5 Gbit/s
Ports & slots
PCIe 5.0 x16 slotsIntel Xeon W-3400 and W-2400 Series Processors
5 x PCIe 5.0 x16 slot(s) (supports x16, x16, x16, x0/x8, x16/x8 modes)
Size & build
Form factorCEB
Width and length12.0 in × 10.5 in
Shipping weight3.52 kg
Package size370 × 312 × 108 mm
More details
BIOS512 Mb Flash ROM, UEFI AMI BIOS

Questions about this item

Does this board fit a standard E-ATX case?

The Pro WS W790-ACE uses the CEB form factor, which is wider than E-ATX. Check your chassis specifications for CEB support before purchasing.

Can I run four DDR5 RDIMMs at the rated 6800 MT/s?

The board supports DDR5 6800 (OC) via Intel XMP 3.0. Achieving that speed depends on the specific memory kit and the Xeon processor installed.

How many PCIe 5.0 x16 slots are wired for full x16 bandwidth?

Three slots run at x16 simultaneously; the fourth and fifth share lanes in x0/x8 or x16/x8 configurations depending on the CPU.

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