Asrock B550M Pro4 - Motherboard - Micro Atx - Socket Am4 - AMD B550

ASRock B550M Pro4 is a compact micro‑ATX motherboard built for Socket AM4 CPUs and designed around the AMD B550 chipset, offering modern connectivity and robust support for AMD Ryzen 3000 series processors.

This board supports a single Socket AM4 processor and is ideal for users who want a capable midrange platform in a small form factor. Its UEFI AMI BIOS with 256 Mbit memory provides flexible firmware control and compatibility with Windows 10 x64 and Windows 11 x64.

Memory-wise the B550M Pro4 offers four DIMM slots with dual‑channel DDR4 support up to a maximum of 128 GB. It accepts both ECC and non‑ECC unbuffered modules and a wide range of memory speeds—officially up to 4733 MHz—so you can tune performance for gaming, content creation, or workstation tasks.

Storage options are plentiful for a micro‑ATX board: three M.2 slots plus six SATA III ports let you mix high‑speed NVMe SSDs and large HDDs, with RAID support for 0, 1, and 10 for increased performance or redundancy. Included SATA cables and drivers make installation straightforward.

For expansion and graphics the motherboard provides one PCIe 4.0 x16 slot and one PCIe 3.0 x16 (and an additional PCIe 3.0 x1 slot), enabling single‑GPU or CrossFireX multi‑GPU setups. Integrated video outputs include HDMI 2.1, DisplayPort 1.4 and VGA, with support for up to three displays and resolutions up to 5120 x 2880.

Connectivity is practical and modern: multiple USB ports (two USB 2.0, four USB 3.2 Gen1 Type‑A, one USB 3.2 Gen2 Type‑A and one Type‑C), a Gigabit Ethernet port driven by the Realtek RTL8111H, and onboard 7.1‑channel audio via the Realtek ALC1200 codec. There is no onboard Wi‑Fi, but a TPM header and numerous fan and RGB headers make this board customization‑friendly.

The ASRock B550M Pro4 suits compact gaming rigs, home workstations and budget content‑creation systems where reliability, storage flexibility and upgrade paths matter. With FCC and CE certification and ErP/EuP readiness, it’s a versatile choice for builders seeking modern I/O and solid performance in micro‑ATX dimensions (244 x 244 mm).

• Socket AM4 for AMD Ryzen 3000 series CPUs
• 4x DDR4 DIMM slots, up to 128 GB, up to 4733 MHz
• 3x M.2 + 6x SATA III, RAID 0/1/10
• PCIe 4.0 x16, HDMI 2.1, DisplayPort 1.4
• Realtek Gigabit LAN, 7.1 audio, multiple USB Type‑A and Type‑C ports