ASUS Prime B550M-A AMD Micro ATX Motherboard

The ASUS Prime B550M-A delivers robust performance for 3rd Generation AMD Ryzen processors in a compact Micro ATX form factor. Built on the AMD B550 chipset with AM4 socket compatibility, this motherboard provides essential features for mainstream PC builds including PCIe 4.0 support, dual M.2 slots, and comprehensive connectivity options.

AMD B550 Chipset with PCIe 4.0 Support

Equipped with the AMD B550 chipset, this motherboard supports 3rd Gen AMD Ryzen processors and next-gen AMD Ryzen PRO CPUs. PCIe 4.0 support on the primary x16 slot and M.2 socket delivers up to 64 Gbps transfer speeds, enabling faster storage and graphics performance for demanding applications.

Dual M.2 Storage and Flexible Expansion

Two M.2 slots accommodate NVMe SSDs up to 22110 length with RAID 0, 1, and 10 support. Four SATA III ports provide additional storage expansion. The single PCIe 4.0 x16 slot supports modern graphics cards, while two PCIe 3.0 x1 slots offer room for additional expansion cards.

DDR4 Memory Support Up to 128GB

Four DDR4 DIMM slots support dual-channel memory configurations up to 128GB total capacity. Memory speeds up to 4800MHz (overclocked) are supported with compatible Ryzen PRO processors, or up to 4600MHz with standard 3rd Gen Ryzen CPUs.

Comprehensive Cooling Solutions

VRM heatsink with thermal pads ensures stable power delivery under sustained workloads. Multiple fan headers including dedicated CPU, CPU OPT, and two chassis fan connectors work with Fan Xpert 2+ for intelligent thermal management.

Triple Display Output Options

Integrated graphics support through compatible AMD Ryzen processors enables multi-monitor setups via VGA, DVI-D, and HDMI ports. This flexibility accommodates various display configurations for productivity and general computing tasks.

Connectivity and Audio

Gigabit Ethernet provides reliable network connectivity. USB 3.2 Gen2 Type-A ports deliver 10Gbps transfer speeds, complemented by additional USB 3.2 Gen1 and USB 2.0 ports. Realtek ALC887 codec with 7.1-channel audio output, audio shielding, and premium Japanese capacitors delivers clear sound quality.

Aura Sync RGB Lighting Support

Onboard addressable Gen 2 RGB headers allow connection of compatible LED strips for customizable lighting effects synchronized through Aura Sync software with other compatible hardware.

Package Contents

Includes I/O shield, two SATA 6Gb/s cables, supporting DVD with drivers and utilities, user manual, and M.2 SSD screw package. Backed by 3-year manufacturer warranty.

AMD B550 (Ryzen AM4) micro ATX motherboard with dual M.2, PCIe 4.0, 1 Gb Ethernet, HDMI/D-Sub/DVI, SATA 6 Gbps, USB 3.2 Gen 2 Type-A, and Aura Sync RGB headers support

• AMD AM4 socket: Ready for 3rd Gen AMD Ryzen™ Processors
• Comprehensive cooling: VRM heatsink, PCH heatsink, and Fan Xpert 2+
• Ultrafast connectivity: Dual M.2, PCIe 4.0, 1 Gb Ethernet, USB 3.2 Gen 2 Type-A
• Aura Sync RGB: Onboard addressable Gen 2 header for RGB LED strips, easily synced with Aura Sync-capable hardware

Description

Specification

• Motherboard Type: Desktop
• Form Factor: Micro ATX
• Socket: AMD AM4
• Chipset: AMD B550
• #Hide#DDR Type: DDR4
• CPU Support: Click here for CPU support
  
  *Note: not compatible with Ryzen 5 3400G & Ryzen 3 3200G CPUs
• RAM Technology: DDR4 (Dual Channel)
• RAM Slots: 4 x DIMM
• RAM Speeds: 3rd Gen AMD Ryzen CPUs:
  4600(O.C)/4400(O.C)/4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3333(O.C.)/3200/3000/2800/2666/2400/2133 MHz
  
  Next Gen AMD Ryzen PRO CPUs:
  4800(O.C.)/4600(O.C)/4466(O.C.)/4400(O.C)/4266(O.C.)/4133(O.C.)/4000(O.C.)/3866(O.C.)/3733(O.C.)/3600(O.C.)/3466(O.C.)/3333(O.C.)/3200/3000/2800/2666/2400/2133 MHz
• Maximum Memory: 128GB
• Graphics: Integrated Graphics Processor*
  
  Graphics specifications may vary between CPU types
• Graphics Ports: 1 x VGA
  1 x DVI-D
  1 x HDMI
• Multi-GPU Support: -
• PCI/PCI Express: 1 x PCIe 4.0 x16 (x16 mode)
  2 x PCIe 3.0 x1
• Storage: 4 x SATA III
  1 x M.2 (2242/2260/2280/22110) - SATA & PCIe
  1 x M.2 (2242/2260/2280) - SATA & PCIe
• RAID: "RAID 0, 1, 10"
• Wireless: -
• LAN: GB LAN
• Audio: Realtek ALC887 7.1 Surround Sound High Definition Audio CODEC
• USB Ports Supported: "2 x USB 3.2 Gen2 Type-A (at back)
  6 x USB 3.2 Gen1 (4 at back, 2 at mid-board)
  4 x USB 2.0 (at mid-board)"
• Back Panel I/O Ports: 1 x PS/2 keyboard/mouse
  1 x DVI-D
  1 x D-Sub
  1 x HDMI
  1 x LAN (RJ45)
  2 x USB 3.2 Gen2 Type-A
  4 x USB 3.2 Gen 1 Type-A
  3 x Audio jacks
• Internal I/O Connectors: 1 x CPU Fan
  1 x CPU OPT Fan
  2 x Chassis Fan
  2 x Aura RGB Strip
  1 x Addressable Gen2
  1 x USB 3.2 Gen1
  2 x USB 2.0
  2 x M.2 Socket 3 with M key
  1 x SPI TPM
  4 x SATA 6Gb/s
  1 x S/PDIF out
  1 x 24-pin EATX
• .: 1 x 8-pin EATX 12V
  1 x Front audio
  1 x Clear CMOS jumper
  1 x System panel
  1 x COM port
  1 x Speaker
• Accessories: I/O Shield
  2 x SATA 6Gb/s cables
  1 x Supporting DVD
  User manual
  1 x M.2 SSD screw package
• Additional Features: See Overview
• Package Type: Retail
• Package Weight: 0.9800 kg
• Warranty: 3 Years
• #Hide#M.2 Slot(s): Yes (M.2)
• #Hide#No. LAN Ports: 1 x LAN
• #Hide#Max LAN Speed: GB LAN