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Green Micro-ATX server motherboard, SP4 socket, four DDR4 slots, two SFP+ ports, multiple miniSAS HD connectors

ASRock Rack

ASRock Rack EPYC3451D4U-2L2T2O8R Micro-ATX Server Motherboard

SKU CH-KB49-3FVAA MPN EPYC3451D4U-2L2T2O8R

Micro-ATX server motherboard with AMD EPYC Embedded 3451 SoC, four DDR4 ECC slots up to 128 GB, dual 10 GbE SFP+, eight SAS/SATA ports and IPMI

  • CPU Socket TypeSocket SP4
  • CPU TypeSupports AMD EPYC Embedded 3451
  • Number of Processor Support1
  • CPU FeaturesThermal Design Power 100W
  • Number of DDR4 Slots4 x 288-pin
  • DDR4 StandardECC UDIMM, RDIMM, LRDIMM: max. 2666 MHz
  • Supports AMD EPYC 3451 SoC with 100W TDP
  • Four DDR4 288-pin slots accept ECC UDIMM RDIMM LRDIMM up to 128GB each
  • One PCIe 3.0 x16 slot plus one PCIe 3.0 x8 slot for add-in cards
  • Eight SAS SATA ports via dual miniSAS HD with RAID 0 1 10 1E
  • Dual 10GbE SFP+ plus dedicated IPMI LAN for remote management

AMD EPYC Embedded 3451 SoC

This Micro-ATX server motherboard integrates an AMD EPYC Embedded 3451 processor in a Socket SP4 package with a 100W thermal design power. It provides four 288-pin DDR4 slots supporting ECC UDIMM, RDIMM and LRDIMM modules up to 2666 MHz and a maximum capacity of 128GB per DIMM. The board includes an Aspeed AST2500 video controller and a dedicated IPMI LAN port for out-of-band management.

Storage density versus expansion slots

The platform suits deployments that need eight SAS or SATA drives through two miniSAS HD connectors with hardware RAID 0, 1, 10 and 1E plus an M.2 slot for a 2280 or 22110 drive. Builders who require more than two PCIe add-in cards should look elsewhere because only one full-length PCIe 3.0 x16 slot and one PCIe 3.0 x8 slot are available and the OCuLink and miniSAS HD interfaces share lanes with the primary slot by BIOS setting.

Dual 10 GbE SFP+ ports

Network connectivity is provided by two SFP+ ports running at 10 GbE from the AMD EPYC Embedded 3451 integrated MAC and a CS4227 PHY, supplemented by two RJ45 10 GbE and two RJ45 1 GbE ports. This fixed 10 GbE SFP+ configuration decides whether the board matches a given network infrastructure.

Highlights

  • Supports AMD EPYC 3451 SoC with 100W TDP
  • Four DDR4 288-pin slots accept ECC UDIMM RDIMM LRDIMM up to 128GB each
  • One PCIe 3.0 x16 slot plus one PCIe 3.0 x8 slot for add-in cards
  • Eight SAS SATA ports via dual miniSAS HD with RAID 0 1 10 1E
  • Dual 10GbE SFP+ plus dedicated IPMI LAN for remote management

Specifications

BrandAsRock Rack
ModelEPYC3451D4U-2L2T2O8R
CPU Socket TypeSocket SP4
CPU TypeSupports AMD EPYC Embedded 3451
Number of Processor Support1
CPU FeaturesThermal Design Power 100W
Number of DDR4 Slots4 x 288-pin
DDR4 StandardECC UDIMM, RDIMM, LRDIMM: max. 2666 MHz
Maximum Memory SupportedMax. Capacity per DIMM: ECC UDIMM, RDIMM, LRDIMM: up to 128GB
ECC SupportedYes
RegisteredYes
PCI Express 3.0 x16SLOT 4: PCIe3.0 x16
PCI Express x16SLOT 6: PCIe x16 (PCIe3.0 x8)
SATAAMD EPYC Embedded 3451:
4 SATA from 1 miniSAS HD*
4 SATA from Oculink*
1 M.2
* OCulink and mini-SAS HD share lanes with SLOT4 by BIOS setting.
SAS8 SAS/SATA from 2 miniSAS HD
SAS RAIDRAID 0/1/10/1E
M.21 x M-key (PCIe3.0x4 or SATA 6Gb/s); Form factor: 22110/2280
Onboard Video ChipsetAspeed AST2500
LAN ChipsetAMD EPYC Embedded 3451 integrated MAC+ CS4227
LAN Speed2 SFP+ (10GbE)
Second LAN ChipsetIntel X710-AT2
Second LAN Speed2 RJ45 (10 GbE)
Third LAN ChipsetIntel i210
Third LAN Speed2 RJ45(1 GbE)
Max LAN Speed10Gbps
Back I/O PortsUID Button/LED: 1
VGA Port: 1 DB15
Serial Port: 1 DB9
USB 3.2 Gen1 Port: 2 Type-A (5Gbps)
RJ45:
- 2 RJ45 (10GbE), 2 RJ45 (10GbE)
- 2 SFP+ (10GbE)
- 1 dedicated IPMI
Onboard USBUSB 3.2 (Gen1) Header: 1 (19-pin) support 2 USB3.2 Gen1
Other ConnectorsPower Connector: 1 ATX PSU signal (4-pin) w/ ATX 24-pin adapter cable, 2 ATX 12V (8-pin) support 12V DC-in
Other Power Connectors: 1 (4-pin, 12V) for HDD power when using 12V DC-in power supply
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
Fan Header: 6 (6-pin)
Thermal Sensor Header: 1
TPM Header: 1 (13-pin, LPC)
SGPIO Header: 1
SMBus header: 1
PMBus header: 1
IPMB Header: 1
Clear CMOS: 1
Front Lan LED Connector: 1 for LAN3/LAN4
NMI
Form FactorMicro ATX
Dimensions (W x L)9.6" x 9.6"
Shipping weight1.41 kg
Package size307 × 284 × 67 mm

Questions about this item

Which memory capacity and speed should I pick for the four DDR4 slots?

The board accepts ECC UDIMM, RDIMM or LRDIMM up to 128 GB per DIMM and runs them at a maximum of 2666 MHz; the QVL lists validated modules such as 8 GB, 16 GB, 32 GB, 64 GB and 128 GB kits at 2400, 2666, 2933 or 3200 MHz.

What does the integrated 10 GbE MAC actually deliver once the board is in a chassis?

The AMD EPYC Embedded 3451 SoC provides two SFP+ ports at 10 GbE and two RJ45 ports at 10 GbE, plus two additional RJ45 ports at 1 GbE and a dedicated IPMI port for management traffic.

How does the PCIe 3.0 layout limit the M.2 and OCuLink connectors?

The single M.2 slot operates at PCIe 3.0 x4 or SATA 6 Gb/s; the five OCuLink connectors and the miniSAS HD ports share lanes with the primary PCIe x16 slot, so enabling them reduces that slot to x8 electrically.

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