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ASUS
ASUS Prime B550M-A WiFi II AMD Micro ATX DDR4 Motherboard

ASUS Prime B550M-A WiFi II AMD Micro ATX DDR4 Motherboard

Best price now

$89.95at Gud ElectronicsChecked Nov 10

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Price facts

  • Last seen at $89.95 at Gud Electronics on Nov 10.

Our take on the ASUS Prime B550M-A WiFi II AMD Micro ATX DDR4 Motherboard

The ASUS Prime B550M-A WiFi II is a micro ATX AM4 motherboard built around AMD's B550 chipset, with PCIe 4.0 to the graphics card and one M.2 slot, onboard WiFi 6 and 1Gb Ethernet. It carries a VRM heatsink, a chipset heatsink and hybrid fan headers with Fan Xpert 2 control, plus HDMI 2.1, DVI and D-Sub outputs for CPUs with integrated graphics. It suits budget and mid-range Ryzen builders who want wireless networking without an add-in card. Against pricier B550 boards it gives up stronger VRM hardware, more M.2 slots and USB-C, so it fits mainstream chips better than high-core overclocking builds.

Best forMicro ATX builds on a budgetBuilders who want onboard WiFi 6Mainstream Ryzen gaming and office PCsFirst-time DIY builders
Pros
  • PCIe 4.0 x16 slot and one PCIe 4.0 x4 M.2 slot
  • WiFi 6 and 1Gb LAN built in
  • VRM and chipset heatsinks with hybrid fan headers
  • HDMI 2.1, DVI and D-Sub outputs for integrated graphics
  • OptiMem memory trace layout for higher-rated DDR4 kits
  • Stainless-steel back I/O and LANGuard protection
Cons
  • No USB-C port on the rear I/O
  • Only one M.2 slot runs at PCIe 4.0; the second is PCIe 3.0
  • Basic VRM not built for high-core overclocking
  • No BIOS FlashBack button for updating without a CPU
  • DVI and D-Sub are legacy outputs most builders won't use

ASUS Prime B550M-A WiFi II AMD Micro ATX DDR4 Motherboard prices at every store

  • Gud ElectronicsNew

    In stockReturn policy

    $89.95Checked Nov 10
    Visit Gud Electronics

What reviewers say

Owners of this board generally describe it as a solid, no-frills B550 board that works out of the box with current Ryzen chips. Praise centers on the built-in WiFi 6, easy setup and stable memory support; complaints focus on the thin feature set and the lack of USB-C.

What people mention
  • ConnectivityPraisedOwners like having WiFi 6 and 1Gb LAN onboard instead of adding a card.
  • SetupPraisedBuilders report the BIOS and layout make a first build simple.
  • USB-CCriticisedBuyers note there is no USB-C port on the rear I/O.
  • ExpansionMixedTwo M.2 slots are welcome, but only one runs at PCIe 4.0 and SATA ports are limited.
  • VRMMixedThe heatsinked VRM is fine for mainstream chips but warms up with high-core overclocking.
  • MemoryPraisedOptiMem helps common DDR4 kits reach their rated speeds without fuss.

About the ASUS Prime B550M-A WiFi II AMD Micro ATX DDR4 Motherboard

The ASUS Prime B550M-A WiFi II is a Micro ATX motherboard with an AMD AM4 socket for 3rd Gen AMD Ryzen processors. It supports DDR4 memory and PCIe 4.0, and it has WiFi 6 and 1Gb LAN.

For cooling, it has a VRM heatsink, a PCH heatsink, hybrid fan headers and the Fan Xpert 2 utility. 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 and SafeSlot Core safeguards. The back I/O panel is stainless steel.

Brand
ASUS
Edition
Prime
Model
PRIME B550M-A WIFI II
Form factor
Micro ATX
Socket
AMD AM4
Processor support
3rd Gen AMD Ryzen
Memory
DDR4
Expansion slot
1 x PCIe 4.0 x16 SafeSlot
Storage
Dual M.2 slots (NVMe SSD), one with PCIe 4.0 x4 connectivity
Connectivity
WiFi 6 (802.11ax), 1Gb LAN
Ports
USB 3.2 Gen 2 Type-A, 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

Questions and answers

Does this board work with Ryzen 5000 CPUs?
Yes. B550 supports Ryzen 5000 and 5000G chips, and most boards ship with a BIOS new enough for them. Older stock may need a BIOS update first, which requires a supported CPU.
Do I need a graphics card with this motherboard?
Only if your CPU lacks integrated graphics. Ryzen chips ending in G have graphics and can use the HDMI, DVI or D-Sub outputs; most other Ryzen CPUs need a discrete card in the PCIe 4.0 x16 slot.
How many M.2 SSDs can I install?
Two. The top slot runs at PCIe 4.0 x4 with a Ryzen 5000 or 3000 CPU; the second slot is PCIe 3.0. Both take standard NVMe drives.
Is WiFi 6 included or do I need an adapter?
WiFi 6 (802.11ax) is built in, along with 1Gb Ethernet. You attach the bundled antenna to the rear connectors for the best signal.
Is this board good for overclocking?
It handles light overclocking and memory tuning, but the VRM is modest. For high-core chips and heavy overclocking, a board with a stronger power stage is the better fit.
What form factor and memory does it take?
It is micro ATX and uses DDR4 DIMMs, up to four modules. Check the memory kit's rated speed against the board's QVL for the easiest setup.
Where is the ASUS Prime B550M-A WiFi II AMD Micro ATX DDR4 Motherboard cheapest?
At Gud Electronics, for $89.95, as of our latest check.

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