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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.

  • CPU Socket TypeLGA 4926
  • CPU TypeAmpere Altra / Ampere Altra Max
  • Number of Processor Support1
  • Number of DDR4 Slots8 x 288-pin
  • DDR4 StandardDDR4 3200
  • Maximum Memory Supported2TB
  • 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.

Highlights

  • 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

Specifications

BrandAsRock Rack
ModelALTRAD8UD-1L2T
CPU Socket TypeLGA 4926
CPU TypeAmpere Altra / Ampere Altra Max
Number of Processor Support1
Number of DDR4 Slots8 x 288-pin
DDR4 StandardDDR4 3200
Maximum Memory Supported2TB
RegisteredYes
PCI Express 4.0 x16SLOT7: PCIe4.0 x16*
SLOT6: PCIe4.0 x16*
SLOT5: PCIe4.0 x16
SLOT4: PCIe4.0 x16**
*Supports PCIe4.0 x8 when using Ampere Altra processors
**SLOT4 do not support full-length card
Other Slots4 SlimSAS (PCIe4.0 x8)
2 OCuLink (PCIe4.0 x4)
M.22 M-key (PCIe4.0 x4); support 2280/2230 form factor
Onboard Video ChipsetAspeed AST2500
LAN ChipsetIntel X550
LAN Speed10Gbps
Second LAN ChipsetIntel I210
Second LAN Speed10/100/1000Mbps
Max LAN Speed2 x 10Gbps + 1Gbps
Back I/O Ports1 x D-Sub / 3 x LAN (RJ45) / 4 x USB 3.2 Gen 1 Type-A
Onboard USBUSB 3.2 (Gen1) Header: 1 (19-pin, 2 USB3.2 Gen1)
Other ConnectorsPower Connector: 1 (4-pin, ATX PSU signal) w/ ATX 24-pin adapter cable, 3 (8-pin, ATX 12V) support 12V DC-in
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
COM Header: 1
VGA header: 1
Speaker Header: 1 (4-pin)
Fan Header: 5 (6-pin)
Thermal Sensor Header: 1
TPM Header: 1 (13-pin, SPI)
SMBus header: 1
PMBus header: 1
IPMB Header: 1
Clear CMOS: 1 (contact pads)
Front Lan LED Connector: 1 (LAN3 LED)
BIOS FeatureAMI UEFI BIOS; 256 Mb (32MB) SPI Flash ROM
ASRock Rack Instant Flash, ACPI 6.2, SMBIOS 3.4.0 and above, Plug and Play(PnP)
Form FactorDeep Micro-ATX
Dimensions (W x L)9.6" x 10.5"
Shipping weight1.68 kg
Package size330 × 305 × 76 mm

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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