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Green Micro-ATX board with grey heatsinks and yellow accents

ASUS

ASUS TUF GAMING B550M-PLU AMD motherboard

SKU CH-3YJF-ZY6W2 MPN TUF GAMING B550M-PLU

Micro-ATX AM4 board with B550 chipset, dual M.2 slots, 2.5 Gb LAN and 7.1 audio for Ryzen 5000 builds

  • ProcessorBIOS update might require for AMD Zen 3 Ryzen 5000 series CP
  • ChipsetAMD B550
  • Form factorMicro ATX
  • CPU socketAM4
  • Memory slot count4 × 288pin (DDR4)
  • Supported memory3rd Gen AMD Ryzen Processors DDR4 4600(O.C)/ 4400(O.C)/ 4266
  • Supports up to 128GB DDR4 memory via four 288-pin slots
  • PCIe 4.0 x16 slot for high-bandwidth graphics with 3rd Gen Ryzen CPUs
  • Dual M.2 slots including one PCIe 4.0 x4 and one PCIe 3.0 x4 for fast storage
  • 5Gbps LAN with Realtek RTL8125B controller for low-latency networking
  • 1-channel audio with Realtek ALC S1200A codec and AI noise-cancelling microphone support

AM4 Socket Board for Ryzen Builders

This Micro ATX motherboard uses the AMD B550 chipset and AM4 socket to support 3rd Gen Ryzen processors. A BIOS update may be required before installing a Ryzen 5000 series CPU. Four DDR4 slots accept up to 128 GB of memory in dual-channel mode. It suits compact gaming or workstation builds.

PCIe 4.0 and 3.0 Limits on One Board

The primary x16 slot runs at PCIe 4.0 x16 when a 3rd Gen Ryzen CPU is installed. A second x16 slot operates at PCIe 3.0 x4 from the chipset. One PCIe 3.0 x1 slot is also available. Two M.2 slots provide storage expansion; the first supports PCIe 4.0 x4, the second PCIe 3.0 x4. Both also accept SATA M.2 drives.

128 GB DDR4 Maximum Memory Capacity

The board supports 128 GB across four slots with speeds up to 4600 MHz overclocked on 3rd Gen Ryzen and 4800 MHz overclocked on next-gen Ryzen PRO. Native JEDEC speeds reach 3200 MHz. This ceiling determines whether the platform fits high-capacity workloads or heavy multitasking.

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).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameASUS
Model nameTUF GAMING B550M-PLUS
Processor
ProcessorBIOS update might require for AMD Zen 3 Ryzen 5000 series CPU. Refer to ASUS website for CPU support list.
CPU socketAM4
ChipsetAMD B550
Memory
Memory slot count4 × 288pin (DDR4)
Supported memory3rd Gen AMD Ryzen Processors
DDR4 4600(O.C)/ 4400(O.C)/ 4266(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3866(O.C.)/ 3733(O.C.)/ 3600(O.C.)/ 3466(O.C.)/ 3333(O.C.)/ 3200/ 3000/ 2800/ 2666/ 2400/ 2133 MHz Un-buffered Memory *
Next Generation AMD Ryzen PRO Processors
DDR4 4800(O.C.)/ 4600(O.C)/ 4466(O.C.)/ 4400(O.C)/ 4266(O.C.)/ 4133(O.C.)/ 4000(O.C.)/ 3866(O.C.)/ 3733(O.C.)/ 3600(O.C.)/ 3466(O.C.)/ 3333(O.C.)/ 3200/ 3000/ 2800/ 2666/ 2400/ 2133 MHz Un-buffered Memory *
* Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists).
Max supported RAM128 GB
Memory channelsDual Channel
Storage
SATA ports4 x SATA 6Gb/s
M.2 slots3rd Gen AMD Ryzen Processors
M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 & SATA modes)
AMD B550 Chipset
M.2_2 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 3.0 x4 & SATA modes)
SATA and RAID support0/1/10
Graphics
Onboard video chipSupported only by CPU with integrated graphic:
1 x DisplayPort 1.2
1 x HDMI 2.1 (4K@60 Hz)
Audio & video
Audio chipRealtek ALC S1200A High Definition Audio CODEC
Sound channels7.1 Channels
Connectivity
Ethernet controllerRealtek RTL8125B
Maximum network speed2.5 Gbit/s
Ports & slots
PCIe 4.0 x16 slots3rd Gen AMD Ryzen Processors
1 x PCIe 4.0 x16 slot (supports x16 mode)
PCIe 3.0 x16 slotsAMD B550 Chipset
1 x PCIe 3.0 x16 slot (supports x4 mode)
PCIe x1 slots1 x PCIe 3.0 x1 slot
* Support PCIe bifurcation for RAID on CPU function.
Rear panel ports2 x USB 3.2 Gen 2 ports (1 x Type-A + 1 x USB Type-C)
4 x USB 3.2 Gen 1 ports (4 x Type-A)
2 x USB 2.0 ports (2 x Type-A)
1 x DisplayPort
1 x HDMI port
1 x Realtek RTL8125B 2.5Gb Ethernet port
5 x Audio jacks
1 x Optical S/PDIF out port
1 x BIOS FlashBack button
1 x PS/2 Keyboard/Mouse combo port
Onboard USB headers1 x USB 3.2 Gen 1 header supports additional 2 USB 3.2 Gen 1 ports
2 x USB 2.0 headers support additional 4 USB 2.0 ports
Power
Power connectors1 × 24-pin Main Power connector
1 × 8-pin +12 V Power connector
Size & build
Form factorMicro ATX
Width and length9.6 in × 9.6 in
Shipping weight1.37 kg
Package size279 × 267 × 70 mm
Compatibility
Windows 11 supportSupported
More details
LightingRGB

Questions about this item

Should I pick a Ryzen 5000 CPU or a Ryzen 3000 CPU for this board?

The board supports both 3rd Gen and Zen 3 Ryzen 5000 series CPUs, but a BIOS update may be required before a 5000 series processor will post.

What does the 2.5 Gbps LAN figure mean for my actual network speed?

The Realtek RTL8125B controller caps wired throughput at 2.5 Gbps, so transfers over a 2.5 GbE switch or router can reach roughly 300 MB/s in ideal conditions.

Which M.2 slot gives me PCIe 4.0 x4 bandwidth for an NVMe drive?

The M.2_1 slot connected to the CPU provides PCIe 4.0 x4, while the M.2_2 slot from the chipset runs at PCIe 3.0 x4.

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