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ASUS TUF Gaming B550M-Plus WiFi II MicroATX motherboard, dark PCB with grey heatsinks

ASUS

ASUS TUF GAMING B550M-PLUS WIFI II AMD AM4 MicroATX motherboard 128GB DDR4

SKU CH-8ZGT-W46AN

MicroATX AM4 board with B550 chipset, one PCIe 4.0 x16 slot, two M.2 slots, DDR4 memory up to 128 GB, USB 3.1 and DisplayPort, sold as motherboard only

  • ProcessorRyzen Series
  • Form factorMicro ATX
  • CPU socketAM4
  • Memory slot countDDR4
  • Max supported RAM128 GB
  • PCIe x16 slots1
  • Supports up to 128GB DDR4 for heavy multitasking
  • PCIe 4.0 x16 slot enables high-bandwidth graphics
  • Two M.2 slots provide fast storage expansion
  • MicroATX form factor fits compact builds
  • AM4 socket works with Ryzen CPUs

Core Platform

The ASUS TUF GAMING B550M-PLUS WIFI II is a new AMD motherboard built on the B550 chipset for AM4 socket processors. It supports Ryzen series CPUs and accepts up to 128GB of DDR4 memory across its slots. The MicroATX form factor fits compact cases while providing a PCI Express 4.0 x16 slot for modern graphics cards. Two M.2 slots are available for storage expansion alongside standard SATA connections.

Target Builder

This board suits builders assembling a compact AM4 system who need wireless networking and a single high-speed graphics slot. It is not for buyers who require multiple PCIe x16 slots for multi-GPU configurations or additional full-length expansion cards. The lack of included I/O shield or cables means builders sourcing a complete accessory kit should look elsewhere.

Deciding Spec

The single specification that determines fit is the AM4 socket paired with the B550 chipset, which dictates compatible Ryzen processors and DDR4 memory only. Verify your exact CPU against the manufacturer compatibility list because some processors may require a BIOS update before they will boot. The 128GB memory ceiling and two M.2 slots set the practical limits for this platform.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $108.99
Cheaper than about 73% of the 1,906 comparable items (median $224.49).

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Specifications

Product
Brand nameASUS
Product lineTUF
Model nameTUF GAMING B550M-PLUS WIFI II
Processor
ProcessorRyzen Series
CPU socketAM4
Memory
Memory slot countDDR4
Max supported RAM128 GB
Ports & slots
PCIe x16 slots1
PCI slots1 x PCI Slot
Ethernet port1 x RJ45
DisplayPort connectors1 x DisplayPort
USB 3.1 ports1 x USB 3.1
Size & build
Form factorMicro ATX

Questions about this item

Which DDR4 memory kit do I need already to reach the 128GB limit on this board?

Four DDR4 modules that together total 128GB will fill the slots and reach the maximum capacity.

Will my existing PCI Express 3.0 graphics card run in the PCIe 4.0 x16 slot?

Yes, the slot is backward compatible so a PCIe 3.0 card will operate at PCIe 3.0 speeds.

How can I confirm the board posts after installing a Ryzen CPU and memory?

Power on the system; if the display connected to the DisplayPort shows the BIOS screen, the board is working.

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