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ASUS

ASUS PRIME B550M-A WIFI II AMD B550 MicroATX M.2 Desktop A motherboard

SKU CH-E2CE-9H6BS

MicroATX AM4 board with B550 chipset, two M.2 slots, PCIe 4.0 x16 and DDR4 memory support

  • Form FactorMicroATX
  • MicroATX form factor fits compact builds
  • B550 chipset supports PCI Express 4.0 x16
  • Two M.2 slots enable fast storage expansion
  • DDR4 memory compatibility for current systems
  • Includes I/O shield, SATA cables and Wi-Fi antenna

ASUS PRIME B550M-A WIFI II AMD AM4 B550 MicroATX

This ASUS PRIME B550M-A WIFI II is a MicroATX motherboard built around the AMD B550 chipset and AM4 socket. It supports DDR4 SDRAM and provides one PCI Express 4.0 x16 slot plus two M.2 slots for storage expansion. The board includes integrated Wi-Fi and ships with an I/O shield, SATA cables, M.2 screws and standoff, and a Wi-Fi antenna. No other accessories are included.

Check CPU compatibility and accessory needs

Before ordering, consult the manufacturer's CPU compatibility list to confirm whether your processor is supported, unsupported, or requires a BIOS update. Verify that your chassis accepts a MicroATX form factor and that your power supply provides the necessary ATX and CPU power connectors. Note that the package contains only the motherboard, I/O shield, SATA cables, M.2 hardware and Wi-Fi antenna; items such as a driver disk, user manual, SLI bridge or additional expansion brackets are not supplied.

Thermals, noise and power draw in normal use

The board uses passive chipset cooling and relies on case airflow for the voltage-regulator area, so fan noise depends entirely on your chosen CPU cooler and case fans. Power draw at the wall will vary with the installed processor, memory kit and storage devices; the B550 chipset itself adds only a modest baseline load. Ensure your case ventilation is adequate for the components you plan to install.

Highlights

  • MicroATX form factor fits compact builds
  • B550 chipset supports PCI Express 4.0 x16
  • Two M.2 slots enable fast storage expansion
  • DDR4 memory compatibility for current systems
  • Includes I/O shield, SATA cables and Wi-Fi antenna

Specifications

BrandASUS
ModelPRIME B550M-A WIFI II
Form FactorMicroATX

Questions about this item

Does the board ship with everything needed for a first build?

The package contains the motherboard, I/O shield, SATA cables, M.2 screws and standoff, and the Wi-Fi antenna. No manual, driver disc or additional brackets are included.

Is there more than one version of this board to pick from?

Only the PRIME B550M-A WIFI II is listed, a single MicroATX model with two M.2 slots and one PCIe 4.0 x16 slot.

What does the PCIe 4.0 x16 slot mean for my graphics card?

The slot provides a PCIe 4.0 x16 electrical link, so a supported GPU can run at the full interface speed the platform allows.

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