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ASUS
ASUS Prime B550M-A WiFi II AMD Micro ATX Motherboard

ASUS Prime B550M-A WiFi II AMD Micro ATX Motherboard

Best price now

$159.99at routeshop shopChecked Nov 10

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Price facts

  • Last seen at $159.99 at routeshop shop on Nov 10.

Our take on the ASUS Prime B550M-A WiFi II AMD Micro ATX Motherboard

The ASUS Prime B550M-A WiFi II is a micro ATX AM4 motherboard built around AMD's B550 chipset. It pairs a PCIe 4.0 x16 slot and one PCIe 4.0 x4 M.2 slot with onboard WiFi 6 and 1Gb Ethernet, so a mid-range Ryzen build needs no add-in network card. Cooling covers the VRMs and chipset with heatsinks and hybrid fan headers tuned through Fan Xpert 2. Against pricier B550 boards it gives up USB-C, debug LEDs and heavier power stages, but it covers the essentials for a mainstream build.

Best forFirst-time Ryzen DIY buildersMicro ATX builds with a single graphics cardUsers who want WiFi 6 without an add-in cardGeneral-purpose and light gaming PCs
Pros
  • PCIe 4.0 x16 slot and a PCIe 4.0 x4 M.2 slot
  • WiFi 6 and 1Gb LAN built in
  • VRM and chipset heatsinks with hybrid fan headers
  • Dual M.2 slots for two NVMe drives
  • HDMI 2.1 plus legacy D-Sub and DVI outputs
  • OptiMem memory trace layout for higher DDR4 speeds
Cons
  • No USB-C port on the rear I/O
  • Only four SATA ports
  • Basic VRM not suited to high-core overclocking
  • No POST code display or debug LEDs
  • Older BIOS may need an update for newer Ryzen chips

ASUS Prime B550M-A WiFi II AMD Micro ATX Motherboard prices at every store

  • routeshop shopNew

    In stockShips from the UK · duties may applyReturn policy

    $159.99Checked Nov 10
    Visit routeshop shop

What reviewers say

Owners of this board generally describe it as a solid, no-frills foundation for a mid-range Ryzen build, with the built-in WiFi 6 and dual M.2 slots cited as the main draws. Complaints center on the limited USB and SATA connectivity and the modest power delivery for overclocking.

What people mention
  • ConnectivityMixedOwners like the onboard WiFi 6 and 1Gb LAN but miss a USB-C port and want more SATA headers.
  • SetupPraisedBuilders report a straightforward install and an understandable BIOS.
  • M.2 slotsPraisedTwo NVMe slots, one at PCIe 4.0 x4, are called out as a strong point for the class.
  • Power deliveryCriticisedThe VRM is seen as basic, so heavy overclocking on high-core chips is not advised.
  • BIOS supportMixedSome buyers needed a BIOS update before newer Ryzen processors would boot.

About the ASUS Prime B550M-A WiFi II AMD Micro ATX Motherboard

The ASUS Prime B550M-A WiFi II is a Micro ATX motherboard with an AMD AM4 socket, built for 3rd Gen AMD Ryzen processors. It supports PCIe 4.0, WiFi 6 (802.11ax) and 1Gb LAN.

It has a VRM heatsink, a PCH heatsink, hybrid fan headers and the Fan Xpert 2 utility for cooling. The ASUS OptiMem trace layout lets memory kits run at higher frequencies with lower voltages.

5X Protection III covers the board with LANGuard, DRAM overcurrent protection, overvoltage protection, SafeSlot Core safeguards and a stainless-steel back I/O.

Form factor
Micro ATX
Socket
AMD AM4
Processor support
3rd Gen AMD Ryzen
Expansion slot
1 x PCIe 4.0 x16 SafeSlot
Storage
Dual M.2 slots (NVMe SSD), one with PCIe 4.0 x4 connectivity
Wireless
WiFi 6 (802.11ax)
Networking
1Gb LAN
USB
USB 3.2 Gen 2 Type-A
Video output
HDMI 2.1 (4K at 60Hz), D-Sub, DVI
Cooling
VRM heatsink, PCH heatsink, hybrid fan headers, Fan Xpert 2 utility
Protection
LANGuard, DRAM overcurrent protection, overvoltage protection, SafeSlot Core, stainless-steel back I/O
Memory
ASUS OptiMem trace layout
Color
Black
Model number

Questions and answers

Which CPUs does it support?
It uses the AMD AM4 socket and is aimed at 3rd Gen AMD Ryzen processors on the B550 chipset. Check ASUS's CPU support list for the exact model you plan to install.
Does it have WiFi and Ethernet?
Yes. It has onboard WiFi 6 (802.11ax) and a 1Gb LAN port, so no add-in network card is needed.
How many M.2 and SATA drives can I connect?
There are two M.2 slots, one with PCIe 4.0 x4, plus four SATA ports for 2.5-inch and 3.5-inch drives.
Can I use two graphics cards?
There is one PCIe 4.0 x16 SafeSlot for the main GPU. A second card would go in a slower slot, so a single-GPU build is the intended setup.
What video outputs does it have?
HDMI 2.1 (4K at 60Hz), D-Sub and DVI, which only work with a Ryzen processor that has integrated graphics.
Is it worth it over a full-size B550 board?
If you want a compact micro ATX build with WiFi 6 and PCIe 4.0 storage, it covers the basics. Full-size boards add more slots, USB ports and stronger power delivery.
Where is the ASUS Prime B550M-A WiFi II AMD Micro ATX Motherboard cheapest?
At routeshop shop, for $159.99, as of our latest check.

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PRIME B550M-A WIFI II
Release date
06-07-2022
Package size
16.4 x 11.1 x 2.6 inches
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