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Green server motherboard, Deep Micro-ATX, LGA 4926 socket, eight DDR4 slots, dual 25GbE SFP28 ports

ASRock Rack

ASRock Rack ALTRAD8UD2-1L2Q server motherboard LGA 4926 8 DIMM DDR4 25GbE SFP28

SKU CH-4DXC-NZZN2 MPN ALTRAD8UD2-1L2Q

Deep Micro-ATX server board with LGA 4926 socket, eight DDR4 DIMM slots, four PCIe 4.0 x16 slots and dual 25 GbE SFP28

  • Deep Micro-ATX form factor fits 9.6" x 10.5" chassis
  • Single LGA 4926 socket runs Ampere Altra Max processors
  • Eight DDR4 DIMM slots at 1DPC density
  • Four PCIe 4.0 x16 lanes plus four SlimSAS x8 connectors
  • Dual 25 GbE SFP28 ports via Broadcom BCM57414

Deep Micro-ATX Server Board

The ASRock Rack ALTRAD8UD2-1L2Q is a Deep Micro-ATX motherboard measuring 9.6 by 10.5 inches. It fits a single LGA 4926 socket for Ampere Altra or Altra Max processors. Eight DDR4 DIMM slots run at one DIMM per channel with 288-pin RDIMM or LRDIMM modules.

Dual 25GbE and PCIe 4.0 I/O

Two SFP28 ports deliver 25GbE connectivity through a Broadcom BCM57414 controller. Four PCIe 4.0 x16 slots, four SlimSAS connectors at PCIe 4.0 x8, two OCuLink ports at PCIe 4.0 x4, and one M.2 slot at PCIe 4.0 x4 provide high-speed expansion for storage and accelerators.

Check Processor and Chassis Fit

Verify that your chosen Ampere Altra or Altra Max CPU matches the LGA 4926 socket and that your chassis accepts the 9.6 by 10.5 inch Deep Micro-ATX form factor. Confirm DDR4 RDIMM or LRDIMM availability for the eight slots and ensure SFP28 transceivers or DAC cables suit your 25GbE network links.

How it compares

Measured against everything we stock in Server & Workstation Boards, at today’s prices. Recalculated every night.

Price $795.99
Pricier than about 91% of the 776 comparable items (median $254.49).

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Specifications

Size & build
Shipping weight1.63 kg
Package size343 × 310 × 76 mm

Questions about this item

How often should I reseat the 8 DDR4 RDIMM or LRDIMM modules in the 288-pin slots?

DDR4 RDIMM and LRDIMM modules in the 288-pin slots are solid-state components with no moving parts; they do not require scheduled reseating unless a physical fault is detected during maintenance.

Which resource saturates first when the two 25GbE SFP28 ports run at line rate on PCIe 4.0 x4 links?

Each 25GbE SFP28 port uses a PCIe 4.0 x4 link from the Broadcom BCM57414 controller; the network bandwidth of 25 Gb/s per port is the limiting factor before the PCIe link capacity is reached.

What is the thermal design power impact of the Broadcom BCM57414 dual 25GbE controller during continuous operation?

The Broadcom BCM57414 dual 25GbE controller is a discrete component on the board; its power draw is included in the platform thermal budget managed by the system integrator's cooling solution.

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