ASUS Prime B550M-A Review & Specs

ASUS Prime B550M-A B550 AM4 dual M.2 PCIe 4.0 DDR4 4400 USB 3.2 Gen 2 Type-A

ASUS Prime B550M-A B550 AM4 dual M.2 PCIe 4.0 DDR4 4400 USB 3.2 Gen 2 Type-A


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  • AM4 Socket: Ready For 3Rd Gen AMD Ryzen Processors
  • Comprehensive Cooling: VRM Heatsink, PCH Fanless Heatsink, M.2 Heatsink, Hybrid Fan Headers And Fan Xpert 2+ Utility
  • Ultrafast Connectivity: Dual M.2, Pcie 4.0, Intel Wifi 6, 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

Specifications Overview

  • PRIME B550M-A
  • 90MB14D0-M0AAY0
  • 90MB14I0-M0EAY0
Release Date June 2020

* First availability for purchase, it may not correspond to the actual market launch date.

Socket AM4
Form factor Micro ATX
Chipset AMD B550
Supported Memory DDR4:
2133Mhz 2400Mhz 2666Mhz 2800Mhz 3000Mhz 3200Mhz 3466Mhz 3600Mhz 3866Mhz 4000Mhz 4400Mhz
* High clock speeds may require enabling the XMP profile in the motherboard BIOS
** RAM support may also depend on the CPU memory controller
ECC RAM Support
* ECC memory support also depends on the CPU memory controller
SLI Support
CrossFire Support
RAID Support
Wireless LAN
PCI-Express x16 Slots 1
PCI-Express x4 Slots 0
PCI-Express x1 Slots 2
SATA 6 Gbps Ports 4
SATA Express Ports 0
M.2 Ports 2
M.2 Devices support
  • 2242 / 2260 / 2280 / 22110 - M Key
  • 2242 / 2260 / 2280 - M Key
RAM Slots 4
Maximum Supported RAM 128GB
Onboard USB 2.0 2
Onboard USB 3.2 Gen 1 1
Onboard USB 3.2 Gen 2 0

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