ASRock B550M-HDV AM4 Micro-ATX Motherboard (B550 Chipset, DDR4)
MPN B550M-HDV · Brand ASROCK · mATX
The ASRock B550M-HDV is a Micro-ATX AM4 motherboard supporting AMD Ryzen 3000 to 5000 series processors, dual-channel DDR4 up to 64 GB, PCIe 4.0 x16, Hyper M.2 (PCIe Gen4), and triple display output via HDMI, DVI-D, and D-Sub
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Overview
The ASRock B550M-HDV is a Micro-ATX form-factor motherboard built on AMD's B550 chipset and designed for the AM4 socket ecosystem. It is compatible with AMD Ryzen 3000 series, Ryzen 4000 G-Series, and Ryzen 5000 series desktop processors — note that a BIOS update may be required before installing Ryzen 5000 series CPUs; please verify compatibility on ASRock's official support page before purchase. Memory support is handled through two DDR4 DIMM slots in dual-channel configuration, accommodating up to 64 GB of unbuffered ECC and non-ECC DDR4 memory. Overclocked profiles reaching DDR4-4733+ are supported (depending on processor generation and memory kit), and the board is compatible with XMP memory modules. DIMM slots feature 15μ gold contacts for reliable long-term connectivity. For expansion, Ryzen 5000 (Vermeer/Matisse) CPUs unlock a PCIe 4.0 x16 slot, while Ryzen APU configurations operate at PCIe 3.0 x16 or x8. An additional PCIe 3.0 x1 slot is available for auxiliary cards. Storage is covered by four SATA3 ports and one Hyper M.2 slot supporting both PCIe Gen4 x4 and SATA3 devices — giving builders flexibility for NVMe SSDs alongside traditional drives. Display output options on the rear I/O include HDMI, DVI-D, and D-Sub (VGA), making this board suitable for builds using an integrated-graphics APU or as a secondary display output. Audio is handled by the Realtek ALC887 codec delivering 7.1-channel HD audio. Networking is covered by a single Gigabit LAN port with ACT/LINK and SPEED LEDs. USB connectivity spans 6 USB 3.2 Gen1 ports total — four on the rear panel and two via an internal front-panel header — plus four additional USB 2.0 ports via two internal headers and two USB 2.0 ports on the rear panel. Internal headers include a 4-pin CPU fan connector, two 4-pin chassis fan connectors with Smart Fan Speed Control, a front-panel audio header, SPI TPM header, COM port header, and chassis intrusion header. The board uses a 6-phase power design to deliver stable power delivery for supported AMD Ryzen processors. Verified Specifications: - Socket: AMD AM4 - Chipset: AMD B550 - Form Factor: Micro-ATX - CPU Support: AMD Ryzen 3000, Ryzen 4000 G-Series, Ryzen 5000 Series (BIOS update may be required) - Memory: 2x DDR4 DIMM, Dual Channel, up to 64 GB, DDR4-4733+ (OC), ECC & non-ECC unbuffered, XMP support - Expansion: 1x PCIe 4.0/3.0 x16, 1x PCIe 3.0 x1 - Storage: 4x SATA3, 1x Hyper M.2 (PCIe Gen4 x4 & SATA3) - Display Output: HDMI, DVI-D, D-Sub - Audio: Realtek ALC887, 7.1 CH HD Audio - LAN: 1x Gigabit Ethernet - Rear USB: 4x USB 3.2 Gen1, 2x USB 2.0 - Internal USB: 1x USB 3.2 Gen1 header (2 ports), 2x USB 2.0 headers (4 ports) - Power Phases: 6 - Legacy I/O: 1x PS/2 Mouse/Keyboard port
Datasheet
| Memory Type | DDR4 |
|---|---|
| Form Factor | mATX |
| Chipset | B550 |
| Socket | AM4 |
| CPU Type | Ryzen 5000, Ryzen 5000 G, Ryzen 4000 G, Ryzen 3000, Ryzen 3000 G |
| Max Memory | 64 GB |
| Memory Speed | up to 4733+ |
| Platform | AMD |
| Graphics Port | HDMI, DVI-D, D-Sub |
| Memory Feature | ECC & non-ECC, un-buffered memory Supports Extreme Memory Profile (XMP) memory modules 15μ Gold Contact in DIMM Slots |
| Expansion Slots | AMD Ryzen series CPUs (Vermeer and Matisse) – 1 x PCI Express 4.0 x16 Slot (PCIE1: x16 mode) AMD Ryzen series APUs (Cezanne and Renoir) – 1 x PCI Express 3.0 x16 Slot (PCIE1: x16 mode) AMD Ryzen series APUs (Picasso) – 1 x PCI Express 3.0 x16 Slot (PCIE1: x8 mode) – 1 x PCI Express 3.0 x1 Slot |
| Channel Supported | Dual Channel |
| Back Panel I/O Ports | – 1 x PS/2 Mouse/Keyboard Port – 1 x D-Sub Port – 1 x DVI-D Port – 1 x HDMI Port – 2 x USB 2.0 Ports (Supports ESD Protection) – 4 x USB 3.2 Gen1 Ports (Supports ESD Protection) – 1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED) – HD Audio Jacks: Line in / Front Speaker / Microphone |
| Internal I/O Connector | – 1 x SPI TPM Header – 1 x COM Port Header – 1 x Chassis Intrusion and Speaker Header – 1 x CPU Fan Connector (4-pin) – 2 x Chassis Fan Connectors (4-pin) (Smart Fan Speed Control) – 1 x 24 pin ATX Power Connector – 1 x 4 pin 12V Power Connector – 1 x Front Panel Audio Connector – 2 x USB 2.0 Headers (Support 4 USB 2.0 ports) (Supports ESD Protection) – 1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports) (Supports ESD Protection) |
