ASUS Prime B550M-A WiFi II Motherboard microATX, AMD B550, Socket AM4, DDR4, PCI 4.0, LAN Realtek 1Gb, WiFi 6 (802.11ax), 2xM.2, 4xSATA 6GB/s, 2xUSB 3.2 Gen 2, Support Aura Sync RGB, Black

Product Name: ITW | ASUS Prime B550M-A WiFi II AM4 Micro-ATX DDR4 Gaming Motherboard

AMD B550 (Ryzen AM4) micro ATX motherboard with dual M.2, PCIe 4.0, Wi-Fi 6, 1 Gb Ethernet, HDMI, DVI-D, D-Sub, SATA 6 Gbps, USB 3.2 Gen 2 Type-A, and Aura Sync RGB lighting support

■ AMD AM4 Socket: Ready for Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors

■ Comprehensive Cooling: VRM heatsink, PCH heatsink, hybrid fan headers, and Fan Xpert 2+ utility

■ Ultrafast Connectivity: Dual M.2, PCIe 4.0, Wi-Fi 6, 1 Gb Ethernet, USB 3.2 Gen 2 Type-A support

■ Aura Sync RGB Lighting: Onboard addressable Gen 2 header and RGB headers for RGB LED strips, easily synced with Aura Sync-capable hardware

Specifications

Model

✎ PRIME B550M-A WIFI II

CPU

✎ AMD Ryzen™ 5000 Series/ 5000 G-Series/ 4000 G-Series/ 3000 Series Desktop Processors

Chipset

✎ B550

Memory

✎ 4 x DIMM, Max. 128GB, DDR4 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, Un-buffered Memory*

✎ Dual Channel Memory Architecture

* ECC memory (ECC mode) support varies by CPU.

* Refer to www.asus.com for the Memory QVL (Qualified Vendors Lists), and memory frequency support depends on the CPU types.

Graphics

✎ 1 x D-Sub port

✎ 1 x DVI-D port

✎ 1 x HDMI® port**

* Graphics specifications may vary between CPU types.

** Supports 4K@60Hz as specified in HDMI 2.1.

Expansion Slots

✎ AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors

■ 1 x PCIe 4.0 x16 slot (supports x16 mode)

✎ AMD Ryzen™ 5000 G-Series/ 4000 G-Series Desktop Processors

■ 1 x PCIe 3.0 x16 slot (supports x16 mode)

✎ AMD B550 Chipset

■ 2 x PCIe 3.0 x1 slots

Storage

Supports 2 x M.2 slots and 4 x SATA 6Gb/s ports

✎ AMD Ryzen™ 5000 Series/ 3000 Series Desktop Processors

■ M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x4 & SATA modes)

■ AMD Ryzen™ 4000 G-Series Desktop Processors

■ M.2_1 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 3.0 x4 & SATA modes)

✎ AMD B550 Chipset

■ M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 3.0 x4 & SATA modes)

■ 4 x SATA 6Gb/s ports

■ Support RAID 0, 1, 10

Ethernet

✎ 1 x Realtek 1Gb Ethernet

✎ ASUS LANGuard

Wireless & Bluetooth

✎ 2x2 Wi-Fi 6 (802.11 a/b/g/n/ac/ax) + BT5.2

✎ Wi-Fi 6

✎ 2x2 Wi-Fi 6 (802.11 a/b/g/n/ac/ax)

✎ Supports 2.4/5GHz frequency band

✎ Bluetooth v5.2

USB

✎ Rear USB:Total 6 ports

■ 2 x USB 3.2 Gen 2 ports (2 x Type-A)

■ 4 x USB 3.2 Gen 1 ports (4 x Type-A)

✎ Front USB:Total 6 ports

■ 1 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

Audio

✎ Realtek 7.1 Surround Sound High Definition Audio CODEC*

■ Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking

■ Supports up to 24-Bit/192 kHz playback

✎ Audio Features

■ Audio Shielding

■ LED-illuminated audio trace path design

■ Premium audio capacitors

■ Dedicated audio PCB layers

* A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.

Back Panel I/O Ports

✎ 2 x USB 3.2 Gen 2 ports (2 x Type-A)

✎ 4 x USB 3.2 Gen 1 ports (4 x Type-A)

✎ 1 x D-Sub port

✎ 1 x DVI-D port

✎ 1 x HDMI® port

✎ 1 x Wi-Fi Module

✎ 1 x Realtek 1Gb Ethernet port

✎ 3 x Audio jacks

✎ 1 x PS/2 Keyboard/Mouse combo port

Operating System

✎ Windows® 11, Windows® 10 64-bit

Form Factor

✎ microATX / 24.4cm x 24.4cm