The ASRock Rack B650D4U is a Micro-ATX AM5 server motherboard for compact server and workstation builders using AMD EPYC 4005/4004 or Ryzen 9000/8000/7000 processors, with ECC-capable DDR5 UDIMM support and IPMI remote management.
Recommended For
- Homelab and small-server builders who want to manage a headless system remotely: the dedicated IPMI/BMC supports remote administration, including HTML5 iKVM and remote media in the reviewed ASRock Rack server implementation.
- Virtualization-host builders who want an AM5 Ryzen or EPYC 4004/4005 platform with ECC UDIMM support for a compact server build.
- Compact NAS or media-server builders who plan to add storage through a PCIe HBA and can work within the board’s four onboard SATA ports; a community build discussion describes using an HBA for an eight-drive ZFS setup.
- Builders putting a Ryzen-based GPU server or workstation into a compact Micro-ATX system who need server-style remote management alongside PCIe expansion; ServeTheHome reviewed a B650D4U-based Ryzen GPU server.
Spec Summary
| Attribute | Value |
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| Best For | Single-processor AM5 server builds using supported AMD EPYC 4004 or Ryzen 7000/8000 processors, with DDR5 ECC UDIMM support |
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| Processor And Platform | Single Socket AM5 (LGA 1718) with AMD B650E chipset; supports AMD EPYC 4004 and Ryzen 7000/8000 processors, with up to 170W TDP when properly cooled |
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| Memory Configuration | 4 DDR5 288-pin ECC or non-ECC UDIMM slots; supports up to 48GB per DIMM, at 5200 MHz with 1DPC or 3600 MHz with 2DPC |
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| Expansion Slots | PCIe 5.0 x16 and x4 slots, plus a PCIe 4.0 x1 slot |
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| Storage And Expansion | 4 SATA 6.0Gb/s ports and two M-key M.2 slots: one PCIe 5.0 x4 and one PCIe 4.0 x4; both support 2242 and 2280 drives |
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| Wired Networking | Two Intel i210 1GbE RJ45 ports plus a dedicated management GLAN port using a Realtek RTL8211F; LAN speeds up to 10/100/1000Mbps |
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| Video And Rear I/O | ASpeed AST2600 onboard video with VGA, DisplayPort, and HDMI outputs; rear I/O includes four Type-A USB 3.2 Gen1 ports, a DB9 COM port, and a UID button with LED |
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| Management And Board Headers | Dedicated IPMI Ethernet connection; headers include TPM (SPI), SMBus, PMBus, IPMB, VGA, speaker, system panel, auxiliary panel, and an 80 debug port; also includes a buzzer, Clear CMOS, and seven fan headers |
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| Power Connections | One 24-pin ATX main power connector and two 8-pin ATX 12V connectors |
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| Form Factor And Dimensions | Micro ATX, 9.6 × 9.6 inches |
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| Model Identifiers | ASRock Rack B650D4U |
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