Description
The ASUS Prime B550M-A is a compact yet capable motherboard designed for AMD Ryzen users seeking performance and reliability. Compatible with Ryzen 3000, 4000, and 5000 series CPUs on the AM4 socket, it features a robust power design and thermal solutions with VRM and chipset heatsinks plus Fan Xpert 2+ support. The board accommodates up to 128 GB of DDR4 RAM with overclocking support, and includes PCIe 4.0 x16 for graphics and dual M.2 slots (one PCIe 4.0 and one PCIe 3.0/SATA) for fast storage. It offers modern connectivity with USB 3.2 Gen 2, HDMI, DisplayPort, DVI-D, D-Sub video outputs, and Gigabit Ethernet. Built with Q-Design features, SafeSlot Core, and Aura Sync RGB headers, it’s a versatile platform for gaming or content creation.

Key Features

• Supports AMD AM4 CPUs: Ryzen 3000/4000/5000 series

• Dual-channel DDR4 memory up to 128 GB, OC 4866 MHz

• PCIe 4.0 x16 GPU slot and PCIe 3.0 x16 (x4) expansion

• Two M.2 slots: one PCIe 4.0 x4 (up to 22110), one PCIe 3.0/SATA

• Four SATA 6 Gb/s ports (RAID 0/1/10)

• Gigabit Realtek Ethernet LAN

• USB 3.2 Gen 2 & Gen 1, DVI-D, HDMI 2.1, DisplayPort 1.2 video outputs

• VRM and chipset heatsinks; ergonomic cooling options

• ASUS 5X Protection III including SafeSlot Core & ESD guards

• Q-DIMM and Q-Slot ease-of-build features

• Aura Sync RGB + addressable Gen 2 header for lighting

• Fan Xpert 2+ for fan control

Key Specifications

• Form Factor: Micro‑ATX (244 × 244 mm)

• Chipset: AMD B550

• CPU Support: Ryzen 5000/4000 G/3000 series CPUs

• Memory: 4× DDR4 DIMMs, up to 128 GB, OC 4866 MHz

• Expansion Slots: PCIe 4.0 x16, PCIe 3.0 x16 (x4), 2× PCIe 3.0 x1

• Storage: 2× M.2 slots, 4× SATA 6 Gb/s

• Networking: Realtek 1 Gb Ethernet

• USB I/O: Rear: USB 3.2 Gen 2 & Gen 1; Front: USB 3.2 Gen 1 & USB 2.0 headers

• Video Ports: D-Sub, DVI-D, HDMI, DisplayPort

• Audio: Realtek ALC887/897 7.1-channel HD codec

• Cooling: VRM and chipset heatsinks, hybrid fan headers

• RGB: Aura Sync + addressable Gen 2 header