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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.

  • CPU Socket TypeLGA 4677
  • CPU TypeSupport Intel Xeon W-3400 and W-2400
  • ChipsetIntel W790
  • Number of Memory Slots8x288pin (DDR5)
  • Memory StandardSupport up to DDR5 6800(OC)
  • Maximum Memory Supported2TB
  • 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.

Highlights

  • 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

Specifications

BrandASUS
ModelPro WS W790-ACE
Part Number90MB1C70-M0AAY0
CPU Socket TypeLGA 4677
CPU TypeSupport Intel Xeon W-3400 and W-2400
ChipsetIntel W790
Number of Memory Slots8x288pin (DDR5)
Memory StandardSupport up to DDR5 6800(OC)
Maximum Memory Supported2TB
Channel SupportedQuad Channel
Memory Performance ProfileIntel XMP 3.0
ECC SupportedYes
PCI Express 5.0 x16Intel 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)
M.2Intel 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 RAID0/1/5/10
SASSlimSAS_1 slot supports PCIe 3.0 x4 mode NVMe device
SlimSAS_2 slot supports PCIe 4.0 x4 mode or up to 4 SATA devices via a transfer cable. The cable is purchased seperately.
SlimSAS_3 slot supports PCIe 4.0 x4 mode NVMe device
Audio ChipsetRealtek 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
Audio Channels7.1 Channels
LAN Chipset1 x Marvell AQtion 10Gb Ethernet
1 x Intel 2.5Gb Ethernet
ASUS LANGuard
Max LAN Speed10Gbps + 2.5Gbps
Back I/O Ports1 x USB 3.2 Gen 2x2 port(s) (1 x USB Type-C)
4 x USB 3.2 Gen 2 port(s) (4 x Type-A)
8 x USB 2.0 port(s) (8 x Type-A)
1 x Marvell AQtion 10Gb Ethernet port
1 x Intel 2.5Gb Ethernet port
5 x Audio jacks
1 x Optical S/PDIF out port
1 x BIOS FlashBack button
1 x Clear CMOS button
Onboard USB1 x USB 3.2 Gen 2x2 connector (support(s) USB Type-C )
1 x USB 3.2 Gen 1 header(s) support(s) 2 additional USB 3.2 Gen 1 ports
2 x USB 2.0 header(s) support(s) 4 additional USB 2.0 ports
Other ConnectorsFan and Cooling related
1 x 4-pin CPU Fan header(s)
1 x 4-pin CPU OPT Fan header(s)
5 x 4-pin Chassis Fan header(s)
1 x W_PUMP+ header(s)
Storage related
2 x M.2 slots (Key M)
3 x SlimSAS slots
4 x SATA 6Gb/s ports
Miscellaneous
1 x BMC header
1 x COM Port header
1 x FlexKey button
1 x Front Panel Audio header (AAFP)
1 x LN2 Mode jumper
1 x ReTry button
1 x Start button
1 x SPI TPM header (14-1pin)
1 x 20-3 pin System Panel header with Chassis intrude function
1 x Thermal Sensor header
1 x VROC Key header
BIOS Feature512 Mb Flash ROM, UEFI AMI BIOS
Form FactorCEB
Dimensions (W x L)12.0" x 10.5"
FeaturesExtreme OC Kit
- FlexKey button
- ReTry button
- Start button
ASUS 5X PROTECTION III
- DIGI+ VRM (- Digital power design with DrMOS)
- ESD Guards
- LANGuard
- Overvoltage Protection
- Safeslot
- Stainless-Steel Back I/O
ASUS Q-Design
- M.2 Q-Latch
- Q-Code
- Q-Connector
- Q-DIMM
- Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device [yellow green])
- Q-Slot
ASUS Thermal Solution
- M.2 heatsink backplate
- M.2 heatsink
- VRM heatsink design
ASUS EZ DIY
- BIOS FlashBack button
- BIOS FlashBack LED
- Clear CMOS button
- ProCool II
- Pre-mounted I/O shield
- SafeSlot
- SafeDIMM
Besp
Package ContentsCables
2 x SATA 6Gb/s cables
Miscellaneous
1 x Q-connector
1 x M.2 Rubber Package(s)
1 x M.2 backplate Rubber Package(s)
Documentation
1 x ACC Express Activation Key Card
1 x User guide
Shipping weight3.52 kg
Package size370 × 312 × 108 mm

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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