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Green Deep Micro-ATX server motherboard with silver LGA 4926 socket and eight black DDR4 slots

ASRock Rack

ASRock Rack ALTRAD8UD-1L2T Deep Micro-ATX Server Motherboard LGA 4926 Dual 10G LAN

SKU CH-G921-4A3SX MPN ALTRAD8UD-1L2T

Deep Micro-ATX server board for single Ampere Altra or Altra Max CPUs, eight DDR4 3200 RDIMM slots up to 2 TB, four PCIe 4.0 x16 slots, four SlimSAS and two OCuLink connectors.

  • ProcessorAmpere Altra / Ampere Altra Max
  • Form factorDeep Micro-ATX
  • CPU socketLGA 4926
  • Network speed10 Gbit/s
  • Supported CPU count1
  • Number of DDR4 slots8 × 288-pin
  • Supports up to 128-core Ampere Altra Max processors via LGA 4926 socket
  • Eight DDR4 3200 RDIMM slots enable 2 TB maximum registered memory capacity
  • Dual Intel X550 10 GbE plus Intel I210 1 GbE provide high-speed network connectivity
  • Four PCIe 4.0 x16 slots plus four SlimSAS and two OCuLink offer extensive I/O expansion
  • Deep Micro-ATX form factor at 9.6" x 10.5" fits dense server chassis deployments

Deep Micro-ATX Server Board

The ASRock Rack ALTRAD8UD-1L2T is a Deep Micro-ATX server motherboard built for the LGA 4926 socket. It supports a single Ampere Altra or Ampere Altra Max processor. The board provides eight 288-pin DDR4 slots running at 3200 MHz with a maximum capacity of 2 TB using registered DIMMs.

Check CPU Cooler And Slot Length

Verify that your chosen cooler appears on the qualified vendor list, which includes specific Noctua, Dynatron and COOLSERVER models for the LGA 4926 socket. Confirm that any full-length PCIe add-in card is intended for slots 5, 6 or 7, because slot 4 does not support full-length cards. Ensure your power supply delivers the required EPS connectors for the single-socket design.

Suits Dense Arm Server Builds

This board suits integrators building dense Arm-based servers who need dual 10 GbE and a dedicated 1 GbE management port. It also fits storage-heavy nodes thanks to four SlimSAS and two OCuLink connectors. Buyers who require multi-socket scaling, a different CPU architecture or more than eight memory channels should look at other platforms.

How it compares

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

Price $619.99
Pricier than about 89% of the 776 comparable items (median $254.49).

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Specifications

Product
Brand nameAsRock Rack
Model nameALTRAD8UD-1L2T
Processor
ProcessorAmpere Altra / Ampere Altra Max
CPU socketLGA 4926
Supported CPU count1
Memory
DDR4 memory supportDDR4 3200
Max supported RAM2 TB
Storage
M.2 slots2 M-key (PCIe4.0 x4); support 2280/2230 form factor
Graphics
Onboard video chipAspeed AST2500
Connectivity
Network speed10 Gbit/s
Ethernet controllerIntel X550
Second LAN controllerIntel I210
Second LAN speed10/100/1000 Mbit/s
Maximum network speed2 × 10 Gbit/s + 1 Gbit/s
Ports & slots
Number of DDR4 slots8 × 288-pin
Additional slots4 SlimSAS (PCIe4.0 x8)
2 OCuLink (PCIe4.0 x4)
Rear panel ports1 x D-Sub / 3 x LAN (RJ45) / 4 x USB 3.2 Gen 1 Type-A
Onboard USB headersUSB 3.2 (Gen1) Header: 1 (19-pin, 2 USB3.2 Gen1)
Size & build
Form factorDeep Micro-ATX
Width and length9.6 in × 10.5 in
Shipping weight1.68 kg
Package size330 × 305 × 76 mm
More details
Registered statusYes
BIOSAMI UEFI BIOS; 256 Mb (32 MB) SPI Flash ROM
ASRock Rack Instant Flash, ACPI 6.2, SMBIOS 3.4.0 and above, Plug and Play(PnP)

Questions about this item

Does the ALTRAD8UD-1L2T include any cables or mounting hardware in the box?

The motherboard ships as a standalone board; cables and mounting hardware are not included and must be sourced separately.

Which Ampere Altra or Altra Max processor should I choose for this LGA 4926 socket?

The socket supports Ampere Altra models Q32-17, Q64-22, Q64-26, Q64-30, Q64-33, Q72-30, Q80-26, Q80-28, Q80-30, Q80-33 and Altra Max models M96-28, M96-30, M112-30, M128-26, M128-28, M128-30; select by core count and frequency to match your workload.

What does the dual 10 GbE from the Intel X550 give me in a real server?

Two RJ45 ports at 10 Gbps each provide high-throughput, low-latency networking for storage replication, virtualisation traffic or backup links, with a third 1 GbE port from the Intel I210 for management.

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