ASUS PRIME B550M-A WIFI II AMD B550 Micro-ATX Motherboard
ASUS
ASUS PRIME B550M-A WIFI II AMD B550 Micro-ATX Motherboard
The ASUS PRIME B550M-A WIFI II is a micro-ATX AMD B550 motherboard for Ryzen 5000, 4000G and 3000 series builders who want dual M.2 slots, PCIe 4.0, Wi-Fi 6 and straightforward performance tuning without unnecessary complexity.
Why this product
Dual M.2 with PCIe 4.0 and RAID
The primary M.2_1 slot runs at full PCIe 4.0 x4 speed and supports drives up to 22110 length. Both slots support NVMe RAID for redundancy or performance.
Wi-Fi 6 and 1 Gb Ethernet
MediaTek Wi-Fi 6 covers 2.4 and 5 GHz bands with Bluetooth 5.2. Wired connection uses Realtek 1 Gb Ethernet with LANGuard protection.
Three video outputs for multi-monitor
HDMI, DVI-D and D-Sub ports let you connect three displays simultaneously without GPU output, useful for office or workstation builds.
Comprehensive cooling and power stages
VRM heatsink, PCH heatsink, hybrid fan headers and Fan Xpert 2+ software give fine-grained control over system temperatures across all loads.
- ChipsetAMD B550
- Form factorMicro-ATX
- Memory support4 x DIMM DDR4, up to 128 GB
- M.2 slots2 (PCIe 4.0 x4 and PCIe 3.0 x4)
- Wi-Fi standardWi-Fi 6 (802.11ax)
- Ethernet1 Gb
- SKUASU-2671
- EAN4711081309741
- Runs all AMD Ryzen 5000 Series, 5000G-Series, 4000G-Series and 3000 Series desktop processors in the AM4 socket.
- Supports up to 128 GB of DDR4 across four DIMM slots, overclocked to 4866 MHz or higher depending on silicon lottery and cooling.
- M.2_1 accepts NVMe drives up to 22110 length; M.2_2 is limited to 2280 or shorter.
- PCIe 4.0 x16 slot is only available on Ryzen 5000 Series processors; Ryzen 5000G/4000G and 3000 Series run the slot at PCIe 3.0 speeds instead.
Best for
- Ryzen 5000 builders wanting PCIe 4.0 NVMe without spending on a full-size board.
- Small-form-factor and office builds needing three independent video outputs and Ethernet plus Wi-Fi.
- Users who want to tune fan curves, memory overclocks and VRM settings through intuitive BIOS and Armoury Crate software.
Trade-offs
- Ryzen 3000 and 4000G builders seeking PCIe 4.0 performance — those CPUs drop the primary slot to PCIe 3.0 speeds.
- Users requiring more than four SATA drives — only four SATA 6 Gb/s ports, with two M.2 slots also consuming SATA bandwidth in certain configurations.
- Builds needing more than one PCIe x16 GPU slot — one x16 slot and two x1 slots only.
PRIME B550M-A WIFI II features dual M.2, PCIe 4.0, MediaTek Wi-Fi 6, 1 Gb Ethernet, HDMI, DVI-D, D-Sub, USB 3.2 Gen 2 Type A, and Aura Sync.
PRIME B550M-A WIFI II caters to daily users and all builders looking for well-rounded specs and a range of options for performance tuning via intuitive software and firmware.
- 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
Comprehensive controls form the foundation of the ASUS Prime series. The Prime B550 motherboard packs flexible tools to tune every aspect of your system, enabling you to tweak performance settings to perfectly match the way you work – maximizing your productivity.
PCIe 4.0 M.2 Slot supports up to 22110 and provide NVMe SSD RAID support for an incredible performance boost.
General
| Brand | ASUS |
|---|---|
| CPU Socket | AMD Socket AM4 (Ryzen 5000 Series, 5000G-Series, 4000G-Series, 3000 Series) |
| Chipset | AMD B550 |
| Form Factor | Micro-ATX |
Memory
| Slots | 4 x DIMM |
|---|---|
| Maximum capacity | 128 GB |
| Type | DDR4 |
| Architecture | Dual Channel |
| Overclocked speeds supported | 4866, 4800, 4600, 4466, 4400, 4333, 4266, 4200, 4133, 4000, 3866 MHz |
Storage
| M.2_1 slot | PCIe 4.0 x4, type 2242/2260/2280/22110, NVMe and SATA modes |
|---|---|
| M.2_2 slot | PCIe 3.0 x4, type 2242/2260/2280, NVMe and SATA modes |
| SATA ports | 4 x SATA 6 Gb/s |
| RAID support | RAID 0, 1, 10 |
Networking
| Ethernet | 1 x Realtek 1 Gb with LANGuard |
|---|---|
| Wi-Fi standard | Wi-Fi 6 (802.11 a/b/g/n/ac/ax) |
| Wi-Fi frequency bands | 2.4 GHz and 5 GHz |
| Bluetooth | v5.2 |
Ports & Power
| Rear USB (Gen 2) | 2 x Type-A |
|---|---|
| Rear USB (Gen 1) | 4 x Type-A |
| Front USB headers | 1 x USB 3.2 Gen 1 (supports 2 ports), 2 x USB 2.0 (support 4 ports) |
| Video outputs | 1 x HDMI, 1 x DVI-D, 1 x D-Sub (supports up to 4K@60Hz on HDMI) |
| Audio jacks | 3 x rear audio, 1 x front panel audio header |
| Power connectors | 1 x 8-pin +12V |
Expansion
| PCIe slots | 1 x PCIe x16 (4.0 on Ryzen 5000, 3.0 on others), 2 x PCIe 3.0 x1 |
|---|
Audio & Lighting
| Audio codec | Realtek 7.1 Surround Sound (ALC887/897) |
|---|---|
| Audio features | 24-Bit/192 kHz playback, dedicated audio PCB layers, premium capacitors, shielding |
| RGB headers | 2 x AURA RGB, 1 x Addressable Gen 2 |
| RGB compatibility | Aura Sync |
BIOS & Features
| BIOS | 256 Mb Flash ROM, UEFI AMI |
|---|---|
| Protection | ASUS 5X PROTECTION III (DIGI+ VRM, LANGuard, Overvoltage Protection, SafeSlot Core) |
| Tuning software | Armoury Crate, AI Suite 3, TurboV EVO, Fan Xpert 2+, DIGI+ VRM, EPU |
Physical
| Included accessories | 2 x SATA cables, 1 x Wi-Fi antenna module, 1 x I/O Shield, 1 x M.2 screw package, 1 x Support DVD, 1 x User manual |
|---|
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.