How much memory can the ASUS Pro WS W790-ACE motherboard support?

The ASUS Pro WS W790-ACE motherboard can support up to 2TB of ECC R-DIMM DDR5 memory.

What type of processors is the ASUS Pro WS W790-ACE motherboard compatible with?

The ASUS Pro WS W790-ACE motherboard is compatible with Intel Xeon W-3400 and W-2400 series processors using the LGA 4677 socket.

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Main image of ASUS Pro WS W790-ACE Intel® W790 (LGA 4677) CEB workstation motherboard, PCIe 5.0 x16, M.2, 10G and 2.5G LAN, Server-grade Remote Management, 12+1+1 power stages, front and Rear USB 3.2 Gen 2x2 Type-C

Alt view image 2 of 8 - ASUS Pro WS W790-ACE Intel® W790 (LGA 4677) CEB workstation motherboard, PCIe 5.0 x16, M.2, 10G and 2.5G LAN, Server-grade Remote Management, 12+1+1 power stages, front and Rear USB 3.2 Gen 2x2 Type-C

Alt view image 3 of 8 - ASUS Pro WS W790-ACE Intel® W790 (LGA 4677) CEB workstation motherboard, PCIe 5.0 x16, M.2, 10G and 2.5G LAN, Server-grade Remote Management, 12+1+1 power stages, front and Rear USB 3.2 Gen 2x2 Type-C

Alt view image 4 of 8 - ASUS Pro WS W790-ACE Intel® W790 (LGA 4677) CEB workstation motherboard, PCIe 5.0 x16, M.2, 10G and 2.5G LAN, Server-grade Remote Management, 12+1+1 power stages, front and Rear USB 3.2 Gen 2x2 Type-C

Alt view image 5 of 8 - ASUS Pro WS W790-ACE Intel® W790 (LGA 4677) CEB workstation motherboard, PCIe 5.0 x16, M.2, 10G and 2.5G LAN, Server-grade Remote Management, 12+1+1 power stages, front and Rear USB 3.2 Gen 2x2 Type-C

Alt view image 6 of 8 - ASUS Pro WS W790-ACE Intel® W790 (LGA 4677) CEB workstation motherboard, PCIe 5.0 x16, M.2, 10G and 2.5G LAN, Server-grade Remote Management, 12+1+1 power stages, front and Rear USB 3.2 Gen 2x2 Type-C

Alt view image 7 of 8 - ASUS Pro WS W790-ACE Intel® W790 (LGA 4677) CEB workstation motherboard, PCIe 5.0 x16, M.2, 10G and 2.5G LAN, Server-grade Remote Management, 12+1+1 power stages, front and Rear USB 3.2 Gen 2x2 Type-C

Alt view image 8 of 8 - ASUS Pro WS W790-ACE Intel® W790 (LGA 4677) CEB workstation motherboard, PCIe 5.0 x16, M.2, 10G and 2.5G LAN, Server-grade Remote Management, 12+1+1 power stages, front and Rear USB 3.2 Gen 2x2 Type-C

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ASUS Pro WS W790-ACE Intel® W790 (LGA 4677) CEB workstation motherboard, PCIe 5.0 x16, M.2, 10G and 2.5G LAN, Server-grade Remote Management, 12+1+1 power stages, front and Rear USB 3.2 Gen 2x2 Type-C

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Intel® LGA 4677 socket: Ready for Intel Xeon® W-3400 & W-2400 processors
CPU and memory overclocking: Supports for up to 2TB of ECC R-DIMM DDR5 memory (2DPC)
Ultrafast connectivity: 5 PCIe 5.0 x16 slots, 10G & 2.5G LAN, 2 M.2, front and rear USB 3.2 Gen 2x2 Type-C® and 3 SlimSAS
Server-grade IPMI remote management: Hardware and software-level with ASUS IPMI expansion card support, plus a real-time monitoring and management software – ASUS Control Center Express
Robust power and thermal design: 12+1+1 power stages, 8-pin PCIe power connector, Massive VRM, chipset and M.2 heatsinks and M.2 backplate
Trusted stability: Highly compatible with the latest technologies with solid QVL list and tested for 24/7 operation, validated for extensive compatibility

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Best Seller Ranking	#79 in Intel Motherboards

Model
Brand	ASUS
Model	Pro WS W790-ACE
Part Number	90MB1C70-M0AAY0

Supported CPU
CPU Socket Type	LGA 4677
CPU Type	Support Intel Xeon W-3400 and W-2400

Chipsets
Chipset	Intel W790

Memory
Number of Memory Slots	8x288pin (DDR5)
Memory Standard	Support up to DDR5 6800(OC)
Maximum Memory Supported	2TB
Channel Supported	Quad Channel
ECC Supported	Yes

Expansion Slots
PCI Express 5.0 x16	Intel 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)

Storage Devices
M.2	Intel 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 RAID	0/1/5/10
SAS	SlimSAS_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

Onboard Audio
Audio Chipset	Realtek 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 layers - Unique de-pop circuit * Due to limitations in HDA bandwidth, 32-Bit/192 kHz is not supported for 7.1 Surround Sound audio.
Audio Channels	7.1 Channels

Onboard LAN
LAN Chipset	1 x Marvell AQtion 10Gb Ethernet 1 x Intel 2.5Gb Ethernet ASUS LANGuard
Max LAN Speed	10Gbps + 2.5Gbps

Rear Panel Ports
Back I/O Ports	1 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

Internal I/O Connectors
Onboard USB	1 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 Connectors	Fan 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

Software Feature
BIOS Feature	512 Mb Flash ROM, UEFI AMI BIOS

Physical Spec
Form Factor	CEB
Dimensions (W x L)	12.0" x 10.5"

Features
Features	Extreme 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 Bespoke Motherboard Design & Business Focused Features - 24/7 Reliability - Overcurrent Protection

Packaging
Package Contents	Cables 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

Additional Information
First Listed on Newegg	May 13, 2026

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ASUS Pro WS W790-ACE Intel® W790 (LGA 4677) CEB workstation motherboard, PCIe 5.0 x16, M.2, 10G and 2.5G LAN, Server-grade Remote Management, 12+1+1 power stages, front and Rear USB 3.2 Gen 2x2 Type-C

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ASUS Pro WS W790-ACE Intel® W790 (LGA 4677) CEB workstation motherboard, PCIe 5.0 x16, M.2, 10G and 2.5G LAN, Server-grade Remote Management, 12+1+1 power stages, front and Rear USB 3.2 Gen 2x2 Type-C

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