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ATX motherboard in dark grey with black heatsinks and yellow accents

ASUS

ASUS TUF GAMING B550-PLUS WIFI II AMD motherboard

SKU CH-H2B3-SM7FP MPN TUF GAMING B550-PLUS WIFI II

An ATX board for AMD AM4 processors with PCIe 4.0, DDR4 up to 4866 MT/s, WiFi 6, 2.5 Gb LAN and dual M.2 slots

  • ProcessorSupports AMD Ryzen 5000 Series / 5000 G-Series / 4000 G-Seri
  • ChipsetAMD B550
  • Form factorATX
  • CPU socketAM4
  • Memory slot count4 × 288pin (DDR4)
  • Supported memoryDDR4 4866(OC) / 4800(OC) / 4600(OC) / 4466(OC) / 4400(OC) /

Model TUF GAMING B550-PLUS WIFI II

  • Supports AMD Ryzen 5000, 4000 and 3000 series CPUs on AM4 socket
  • 8+2 DrMOS power stages deliver stable power for high-core-count processors
  • WiFi 6 and 2.5 Gb LAN provide fast, reliable network connectivity
  • Dual M.2 slots with one PCIe 4.0 x4 for high-speed NVMe storage
  • SupremeFX S1220A codec with DTS audio and AI noise-cancelling microphone technology

AM4 Platform Foundation

The ASUS TUF GAMING B550-PLUS WIFI II motherboard targets builders who need a stable AM4 platform for AMD Ryzen 5000 Series, 5000 G-Series, 4000 G-Series and 3000 Series processors. It provides four DDR4 slots supporting up to 128 GB in dual-channel mode with Intel XMP 2.0 profiles. A single PCI Express 4.0 x16 slot, one PCI Express 3.0 x16 slot running at x4 and three PCIe 3.0 x1 slots handle expansion, while six SATA 6 Gb/s ports and two M.2 sockets cover storage needs.

Sustained Load Behaviour

An 8+2 DrMOS power stage design with alloy chokes and durable capacitors delivers steady current to high-core-count CPUs during extended workloads. Fanless VRM and PCH heatsinks dissipate heat without adding noise, while multiple hybrid fan headers and Fan Xpert 4 or UEFI Q-Fan Control let the system adjust airflow as temperatures rise. This arrangement keeps power delivery consistent when the processor runs at full load for long periods.

Build Quality And Connectivity

The board integrates WiFi 6 (802.11ax) and 2.5 Gb LAN with LANGuard for reliable wired and wireless networking. Rear I/O includes HDMI 2.1 and DisplayPort 1.2 for integrated graphics, USB 3.2 Gen 2 Type-C and Type-A ports, and a front-panel USB 3.2 Gen 1 header. Audio uses a SupremeFX S1220A codec with DTS support for 7.1 channel output, and a TPM header is provided for platform security.

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
Model nameTUF GAMING B550-PLUS WIFI II
Processor
ProcessorSupports AMD Ryzen 5000 Series / 5000 G-Series / 4000 G-Series / 3000 Series Processors *
* Refer to www.asus.com for CPU support list.
CPU socketAM4
ChipsetAMD B550
Memory
Memory slot count4 × 288pin (DDR4)
Supported memoryDDR4 4866(OC) / 4800(OC) / 4600(OC) / 4466(OC) / 4400(OC) / 4333(OC) / 4266(OC) / 4200(OC) / 4133(OC) / 4000(OC) / 3866(OC) / 3733(OC) / 3600(OC) / 3466(OC) / 3400(OC) / 3333(OC) / 3200 / 3000 / 2933 / 2800 / 2666 / 2400 / 2133*
* Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists), and memory frequency support depends on the CPU types.
Max supported RAM128 GB
Memory channelsDual Channel
Memory profilesIntel XMP 2.0
ECC supportECC Memory (ECC mode) support varies by CPU.
BufferingUn-buffered
Storage
SATA ports6 x SATA 6Gb/s
SATA and RAID support0/1/10
Graphics
Onboard video chipSupported only by CPU with integrated graphic
Audio & video
Sound channels7.1 Channels
Connectivity
Ethernet controllerRealtek 2.5Gb Ethernet
Maximum network speed2.5 Gbit/s
Wi-Fi standardWi-Fi 6
802.11a/b/g/n/ac/ax
Bluetooth support5.2
Ports & slots
PCIe 4.0 x16 slots1 x PCI Express 4.0 x16*
* Actual support may vary by CPU..
PCIe 3.0 x16 slots1 x PCI Express 3.0 x16*
* Supports x4 mode.
PCIe x1 slots3 x PCIe 3.0 x1 *
* PCIE 3.0 X16_2 runs x1 mode when any of the PCIe 3.0 x1 slots is occupied.
Onboard USB headers1 x USB 3.2 Gen 1 header(s) support(s) additional 2 USB 3.2 Gen 1 ports
2 x USB 2.0 header(s) support(s) additional 4 USB 2.0 ports
Power
Power connectors1 × 24-pin Main Power connector
1 × 8-pin +12 V Power connector
Size & build
Form factorATX
Width and length12.0 in × 9.6 in
Shipping weight1.61 kg
Package size338 × 272 × 69 mm
Compatibility
Windows 11 supportReady
More details
LightingRGB

Other versions of this model

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Questions about this item

How quiet does the board stay with the fanless VRM and PCH heatsink when the system runs all day?

The board uses a fanless VRM and PCH heatsink, so no chipset fan noise is added. Multiple hybrid fan headers and Fan Xpert 4 or UEFI Q-Fan Control let you tune case-fan curves for low noise under sustained load.

Which DDR4 memory kit and AM4 processor must I already have to use the four 288-pin slots up to 128 GB?

You need an AMD Ryzen 5000 Series, 5000 G-Series, 4000 G-Series or 3000 Series CPU and un-buffered DDR4 DIMMs; the board runs dual-channel up to 128 GB with speeds from 2133 to 4866(OC) depending on the processor installed.

Will my existing PCIe 3.0 graphics card and SATA SSDs work in the PCIe 3.0 x16 slot and the six SATA 6Gb/s ports?

Yes. The second x16 slot is electrically PCIe 3.0 x4 and the six SATA 6Gb/s ports are native to the B550 chipset, so older GPUs and SATA drives connect without adapters.

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