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Green rectangular server motherboard with silver CPU socket, eight black memory slots, multiple expansion slots and rear I/O panel

ASRock Rack

ASRock Rack SIENAD8UD3 Deep Micro-ATX server motherboard

SKU CH-5HFS-JCZ60 MPN SIENAD8UD3

Deep Micro-ATX server board with single SP6 socket for AMD EPYC 8004 series, eight DDR5 4800 RDIMM slots up to 768 GB, two PCIe 5.0 x16 slots with CXL 1.1.

  • CPU Socket TypeSocket SP6
  • CPU TypeSupports AMD EPYC 8004 series processors
  • Number of Processor Support1
  • Memory Slots8 x DDR5 288-pin
  • Memory StandardDDR5 4800
  • Maximum Memory Supported768GB
  • Supports AMD EPYC 8004 series processors for high-density compute
  • Eight DDR5 4800 RDIMM slots scale to 768 GB memory capacity
  • Two PCIe 5.0 x16 slots with CXL 1.1 enable fast GPU or accelerator attach
  • Seven MCIO connectors deliver PCIe 5.0 x8 or up to eight SATA 6 Gb/s ports
  • Dual 1 GbE Intel I210 LAN plus Aspeed AST2600 graphics for remote management

Deep Micro-ATX server board for AMD EPYC 8004

The SIENAD8UD3 is a Deep Micro-ATX server motherboard built around a single Socket SP6 (LGA 4844) for AMD EPYC 8004 series processors. It targets compact rack or tower deployments that need server-class compute density. The board delivers eight DDR5 RDIMM slots with a maximum capacity of 768GB at 4800 MT/s. Integrated Aspeed AST2600 graphics and dual 1GbE Intel I210 ports handle remote management and basic connectivity.

Verify CPU cooler clearance and power delivery

Confirm that your chassis can accommodate the 9.6 by 10.5 inch Deep Micro-ATX footprint and a compatible SP6 cooler. The board requires three 8-pin ATX 12V connectors plus a 4-pin ATX signal connector with an included 24-pin adapter cable; alternatively it supports 12V DC-in. Ensure your power supply provides the necessary 12V current for the chosen EPYC 8004 processor and all installed peripherals.

Two PCIe 5.0 x16 slots and flexible storage lanes

Two full-length PCIe 5.0 / CXL 1.1 x16 slots (SLOT4 and SLOT6) accept GPUs, accelerators or high-speed NICs. Four MCIO connectors each offer either PCIe 5.0 x8 or two SATA 6Gb/s ports, while three additional MCIO connectors provide PCIe 5.0 x8. An OCuLink port adds PCIe 3.0 x4, and two M-key M.2 slots support 22110 or 2280 form factors at PCIe 5.0 x4. A front-panel USB 3.2 Gen 1 header supplies two Type-A ports.

Highlights

  • Supports AMD EPYC 8004 series processors for high-density compute
  • Eight DDR5 4800 RDIMM slots scale to 768 GB memory capacity
  • Two PCIe 5.0 x16 slots with CXL 1.1 enable fast GPU or accelerator attach
  • Seven MCIO connectors deliver PCIe 5.0 x8 or up to eight SATA 6 Gb/s ports
  • Dual 1 GbE Intel I210 LAN plus Aspeed AST2600 graphics for remote management

Specifications

BrandAsRock Rack
ModelSIENAD8UD3
CPU Socket TypeSocket SP6
CPU TypeSupports AMD EPYC 8004 series processors
Number of Processor Support1
Memory Slots8 x DDR5 288-pin
Memory StandardDDR5 4800
Maximum Memory Supported768GB
RegisteredYes
PCI Express 5.0 x16SLOT6: PCIe5.0 / CXL1.1 x16
SLOT4: PCIe5.0 / CXL1.1 x16
Other Slots4 MCIO (PCIe5.0 x8 or 8 SATA 6Gb/s)
3 MCIO (PCIe5.0 x8)
1 OCuLink (PCIe3.0 x4)
M.22 M-key (PCIe5.0 x4), supports 22110/2280 form factor
Onboard Video ChipsetAspeed AST2600
LAN ChipsetIntel I210
LAN Speed10Gbps
Max LAN Speed2 x 1Gbps
Back I/O Ports1 x D-Sub / 2 x LAN (RJ45) / 2 x USB 3.2 Gen 1 Type-A
Onboard USBUSB 3.2 (Gen1) Header: 1 header (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
Other Power Connectors: 1 (6-pin) for HDD power
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
Speaker Header: 1 (4-pin)
Buzzer: 1
Fan Header: 6 (6-pin)
Thermal Sensor Header: 1
TPM Header: 1 (13-pin, SPI)
SGPIO Header: 3
SMBus header: 1
PMBus header: 1
IPMB Header: 1
Clear CMOS: 1 (contact pads)
Front Lan LED Con
BIOS FeatureAMI UEFI BIOS; 256 Mb SPI Flash ROM
ASRock Rack Instant Flash, ACPI 6.4 and above compliance wake up events, SMBIOS 3.5.0 and above, Plug and Play(PnP)
Form FactorDeep Micro-ATX
Dimensions (W x L)9.6" x 10.5"
Shipping weight0.68 kg
Package size356 × 330 × 76 mm

Questions about this item

Does the SIENAD8UD3 ship with a CPU cooler, memory modules or any cables, or must those be purchased separately?

The board is sold by itself; a Socket SP6 cooler, DDR5 4800 RDIMMs and any MCIO, OCuLink or SATA cables required for your storage layout must be sourced separately.

Which AMD EPYC 8004 series processor should I choose for the single Socket SP6 on this board?

The supported list includes the 8024P, 8124P, 8224P, 8324P, 8434P, 8534P and their PN variants; select based on core count, TDP and budget.

What does the 768 GB maximum memory figure mean when I populate all eight DDR5 slots?

Using eight 96 GB DDR5 4800 RDIMMs reaches the 768 GB limit; smaller modules such as 16 GB, 32 GB or 64 GB RDIMMs will give lower totals.

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