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Green server motherboard, Deep Micro-ATX form factor, eight DDR5 slots, four PCIe5.0 x16 slots, dual 10GbE RJ45 ports

ASRock Rack

ASRock Rack W790D8UD-1L1N2T/BCM server motherboard LGA 4677 8 DDR5 4 PCIe5.0 x16 2 OCuLink 1 M.2 2 10GbE

SKU CH-6YSW-NTATE MPN W790D8UD-1L1N2T/BCM

Server motherboard with LGA 4677 socket, eight DDR5 slots, four PCIe 5.0 x16 slots, two OCuLink ports, one M.2 slot, and dual 10GbE LAN

  • CPU Socket TypeLGA 4677
  • CPU TypeIntel Xeon W-2500/2400 and W-3500/3400 series processors
  • Number of Processor Support1
  • North BridgeIntel W790
  • Memory Slots8 x DDR5 288-pin
  • Memory StandardDDR5 4800
  • Supports up to 2TB DDR5 4800 registered memory across eight slots
  • Four PCIe 5.0 x16 slots driven directly by the CPU
  • Two OCuLink connectors provide PCIe 4.0 x4 or SATA 6Gb/s flexibility
  • Dual 10GbE ports powered by Broadcom BCM57416 for high-speed networking
  • Deep Micro-ATX form factor fits 10.4 by 10.5 inch chassis

Server Motherboard for Xeon W Workstations

This ASRock Rack board uses the LGA 4677 socket and Intel W790 chipset to support a single Xeon W-2400, W-2500, W-3400 or W-3500 series processor. Eight DDR5 288-pin slots accept registered memory up to 2 TB at DDR5 4800 speed. It targets builders who need high core counts and large memory capacity in a Deep Micro-ATX form factor.

Practical Limits of PCIe 5.0 and OCuLink

Four full-length PCIe 5.0 x16 slots connect directly to the CPU for maximum bandwidth with accelerators or GPUs. Two OCuLink connectors run at PCIe 4.0 x4 from the chipset; one can alternatively carry four SATA 6 Gb/s ports. The single M.2 M-key slot also uses a PCIe 4.0 x4 chipset lane and fits 2280 modules.

Dual 10GbE Decides Network Fit

Two RJ45 ports driven by the Broadcom BCM57416 provide 10 Gbps Ethernet. A second Intel i226 controller adds 2.5 Gbps and a third Intel i210 adds Gigabit for management. If the deployment does not require dual 10 GbE, the board still offers the PCIe 5.0 slots and memory capacity for compute-heavy tasks.

Highlights

  • Supports up to 2TB DDR5 4800 registered memory across eight slots
  • Four PCIe 5.0 x16 slots driven directly by the CPU
  • Two OCuLink connectors provide PCIe 4.0 x4 or SATA 6Gb/s flexibility
  • Dual 10GbE ports powered by Broadcom BCM57416 for high-speed networking
  • Deep Micro-ATX form factor fits 10.4 by 10.5 inch chassis

Specifications

BrandAsRock Rack
ModelW790D8UD-1L1N2T/BCM
CPU Socket TypeLGA 4677
CPU TypeIntel Xeon W-2500/2400 and W-3500/3400 series processors
Number of Processor Support1
North BridgeIntel W790
Memory Slots8 x DDR5 288-pin
Memory StandardDDR5 4800
Maximum Memory Supported2TB
RegisteredYes
PCI Express 5.0 x16SLOT7: PCIe5.0 x16 [CPU]
SLOT6: PCIe5.0 x16 [CPU]
SLOT5: PCIe5.0 x16 [CPU]
SLOT4: PCIe5.0 x16 [CPU]
Other Slots1 OCuLink (PCIe4.0 x4 or 4 SATA 6Gb/s) [PCH]
1 OCuLink (PCIe4.0 x4) [PCH]
M.21 M-key (PCIe4.0 x4), supports 2280 form factor [PCH]
Onboard Video ChipsetAspeed AST2600
LAN ChipsetBroadcom BCM57416
LAN Speed10Gbps
Second LAN ChipsetIntel i226
Second LAN Speed2.5Gbps
Third LAN ChipsetIntel i210
Third LAN Speed10/100/1000Mbps
Max LAN Speed2 x 10Gbps + 2.5Gbps + 1Gbps
Back I/O Ports1 x COM (Serial Port) / 1 x D-Sub / 2 x USB 3.2 Gen 1 Type-A / 4 x LAN (RJ45)
Other ConnectorsPower Connector: 1 Micro-Fit (4-pin, ATX PSU signal) w/ ATX 24-pin adapter cable, 4 (8-pin, ATX 12V)
Auxiliary Panel Header: 1 (18-pin): chassis intrusion, system fault LED, LAN1/LAN2 activity LED, locate, SMBus
System Panel: 1 (9-pin): power switch, reset switch, system power LED, HDD activity LED
Speaker Header: 1 (4-pin)
Buzzer: 1
Fan Header: 7 (4-pin)
Thermal Sensor Header: 1
TPM Header: 1 (13-pin, SPI)
SGPIO Header: 1
HSBP: 1
SMBus header: 1
PMBus header: 1
IPMB Header: 1
Clear CMOS: 1 (contact pads)
Others: 2 (1-pin, TGPIO header)
Front Lan LED Connector: 1
NMI Header: 1
BIOS FeatureAMI 256Mb SPI Flash ROM
Plug and Play, ACPI 5.0 and above compliance wake up events, SMBIOS 2.3 and above, ASRock Rack Instant Flash
Form FactorDeep Micro-ATX
Dimensions (W x L)10.4" x 10.5"
Shipping weight0.91 kg
Package size267 × 264 × 51 mm

Questions about this item

Should I pick the W790D8UD-1L1N2T/BCM with 8 DDR5 slots and 2 TB max or a board with fewer slots?

This board provides 8 DDR5 288-pin slots and supports up to 2 TB of registered DDR5 4800 memory, so choose it when you need maximum capacity and 2 DIMMs per channel.

What does the 10 GbE Broadcom BCM57416 controller deliver in a live server?

The dual 10 GbE ports from the Broadcom BCM57416 provide two 10 Gbps RJ45 links for high-throughput networking alongside a 2.5 GbE Intel i226 port and a 1 GbE Intel i210 port.

How do the PCIe 5.0 x16 slots and OCuLink connectors limit add-in cards?

Four PCIe 5.0 x16 slots connect directly to the CPU, while two OCuLink connectors from the PCH each provide PCIe 4.0 x4 or four SATA 6 Gb/s lanes for storage expansion.

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