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

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.