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Green Micro-ATX server board with silver CPU socket, four black DDR5 slots, three PCIe slots, two 10GbE and two 1GbE RJ45 ports

ASRock Rack

ASRock Rack B650D4U-2L2T/BCM Micro-ATX server motherboard

SKU CH-4NRX-KPGZS MPN B650D4U-2L2T/BCM

Micro-ATX server board with dual 10 GbE and single AM5 socket for EPYC 4004 or Ryzen CPUs

  • CPU Socket TypeSingle Socket AM5 (LGA 1718)
  • CPU TypeSupports AMD EPYC 4004 and AMD Ryzen 8000/7000 Series Proces
  • Number of Processor Support1
  • CPU FeaturesThermal Design Power: Up to 170W by proper cooling solution
  • North BridgeAMD B650E
  • Memory Slots4 DIMM slots (2DPC) DDR5 288-pin ECC/non-ECC UDIMM

Style ASRock rack B650D4U-2L2T

Struck-through versions exist but are not stocked here.

  • Supports AMD EPYC 4004 and Ryzen 7000/8000/9000 series CPUs
  • Four DDR5 DIMM slots accept ECC and non-ECC UDIMM up to 48 GB each
  • Dual 10 GbE ports via Broadcom BCM57416 plus dual 1 GbE via Intel i210
  • PCIe 5.0 x16 and x4 slots from CPU for high-bandwidth add-in cards
  • Micro-ATX 9.6" form factor fits compact server chassis

Micro-ATX EPYC and Ryzen server board

This Micro-ATX server motherboard fits single-socket AMD EPYC 4004 and AMD Ryzen 7000, 8000 and 9000 series processors in an LGA 1718 socket. It is built for compact 1U or 2U rackmount chassis where dual 10GbE and dual 1GbE ports are required. The board suits storage, virtualisation and edge workloads that need ECC memory and multiple PCIe 5.0 lanes in a small footprint.

PCIe 5.0 lanes and dual 10GbE limits

One PCIe 5.0 x16 slot and one PCIe 5.0 x4 slot connect directly to the CPU, while a single PCIe 4.0 x1 slot runs from the chipset. The M.2 M-key slot accepts 2280 and 2242 drives at PCIe 5.0 x4 speeds. Four SATA 6.0Gb/s ports provide additional drive connectivity. Memory runs at 5200 MHz with one DIMM per channel and drops to 3600 MHz when both channels are populated. Maximum capacity per DIMM is 48GB across four slots.

Check CPU cooler clearance and power delivery

Verify that your chosen processor TDP up to 170W can be cooled within the chassis height and airflow available. Confirm the power supply provides sufficient 12V current for the CPU and any add-in cards. Ensure DDR5 ECC or non-ECC UDIMMs match the qualified vendor list for stable operation at the rated speeds. The Aspeed AST2600 provides basic video output for headless management.

Highlights

  • Supports AMD EPYC 4004 and Ryzen 7000/8000/9000 series CPUs
  • Four DDR5 DIMM slots accept ECC and non-ECC UDIMM up to 48 GB each
  • Dual 10 GbE ports via Broadcom BCM57416 plus dual 1 GbE via Intel i210
  • PCIe 5.0 x16 and x4 slots from CPU for high-bandwidth add-in cards
  • Micro-ATX 9.6" form factor fits compact server chassis

Specifications

BrandAsRock Rack
ModelB650D4U-2L2T/BCM
CPU Socket TypeSingle Socket AM5 (LGA 1718)
CPU TypeSupports AMD EPYC 4004 and AMD Ryzen 8000/7000 Series Processors
Number of Processor Support1
CPU FeaturesThermal Design Power: Up to 170W by proper cooling solution
North BridgeAMD B650E
Memory Slots4 DIMM slots (2DPC)
DDR5 288-pin ECC/non-ECC UDIMM
Memory Standard5200 MHz (1DPC); 3600 MHz (2DPC)
Maximum Memory SupportedMax. Capacity per DIMM: 48GB
ECC SupportedYes
PCI Express 5.0 x16SLOT6: PCIe5.0 x16 [CPU]
PCI Express x4SLOT7: PCIe5.0 x4 [CPU]
PCI Express x1SLOT4: PCIe4.0 x1 [FCH]
SATA4 x SATA 6.0Gb/s
M.21 M-key (PCIe5.0 x4), supports 2280/2242 form factor [CPU]
Onboard Video ChipsetAspeed AST2600
LAN ChipsetBroadcom BCM57416: 2 RJ45 (10GbE)
LAN Speed10Gbps
Second LAN ChipsetIntel i210: 2 RJ45 (1GbE)
Second LAN Speed10/100/1000Mbps
Max LAN Speed10Gbps
Back I/O PortsUID Button/LED: 1 UID button w/ LED
VGA Port: 1 DB15 (VGA), 1 DisplayPort, 1 HDMI
Serial Port: 1 DB9 (COM)
USB 3.2 Gen1 Port: 4 Type-A (USB3.2 Gen1)
RJ45: 2 RJ45 (10GbE), 2 RJ45 (1GbE), 1 dedicated IPMI
Other ConnectorsPower Connector: 1 (24-pin, ATX main power), 2 (8-pin, ATX 12V)
Auxiliary Panel Header: 1 (18-pin): chassis intrusion, system fault LED, LAN activity LED
System Panel: 1 (9-pin): power switch, reset switch, system power LED, HDD activity LED
VGA header: 1
Speaker Header: 1
Buzzer: 1
Fan Header: 7 (6-pin)
TPM Header: 1 (13-pin, SPI)
SMBus header: 1
PMBus header: 1
IPMB Header: 1
Clear CMOS: 1
Others: 1 (3-pin, 80 debug port header)
Front Lan LED Connector: 1
Form FactorMicro ATX
Dimensions (W x L)9.6" x 9.6"
Shipping weight1.36 kg
Package size244 × 244 × 74 mm

Other versions of this model

4 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Should I pick the EPYC 4005 or 4004, or a Ryzen 9000/8000/7000 chip for this LGA 1718 board?

The socket accepts one AMD EPYC 4005, EPYC 4004 or Ryzen 9000/8000/7000 series processor up to 170 W TDP; choose EPYC for registered ECC memory support and Ryzen for higher single-thread clocks.

What does the 5200 MHz DDR5 rating mean once I populate all four DIMM slots?

With one DIMM per channel the board runs DDR5 at 5200 MHz; filling all four slots drops the speed to 3600 MHz while keeping ECC or non-ECC operation.

How do the two 10GbE ports and the PCIe 5.0 x16 slot share bandwidth from the CPU?

The Broadcom BCM57416 provides two 10 GbE RJ45 ports, while the PCIe 5.0 x16 slot (SLOT6) and PCIe 5.0 x4 slot (SLOT7) connect directly to the CPU for full 5.0 bandwidth.

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