Prime B550M-A WiFi
The ASUS Prime B550M-A WiFi is a Micro ATX AM4 motherboard on the B550 chipset. It supports DDR4 memory up to 4,600 MT/s and 2 M.2 slots. It's out of stock at the retailers we track right now, but the specs below still apply whenever it returns.
Prices update regularly and may differ at the retailer. This page contains affiliate links.
MaxMyBuild scores
How we score →How well the Prime B550M-A WiFi is equipped for gaming and for productivity, scored 0–100 from its specs. Scores are fit-for-purpose: a capable board can top the gaming score without being the most expensive.
Weighs CPU power delivery, memory speed support, the GPU PCIe slot, Wi-Fi version, and M.2 storage — the things that actually matter for a gaming build.
Rewards fast, plentiful M.2 storage and USB I/O, PCIe expansion, memory capacity and slots — what matters for content creation and heavy multitasking.
CPU power
115 W
The Prime B550M-A WiFi is wired to feed about 115 W to the processor. The figure comes from its 4+4 power-stage (VRM) layout and 8 EPS connectors. It is a rating of what the board is built to deliver, not a measurement, so treat it as headroom rather than a guarantee.
Specifications
Platform
- Chipset
- B550
- Socket
- AM4
- Form factor
- Micro ATX
- MSRP
- $150.00
Memory
- Type
- DDR4
- Slots
- 4
- Max speed
- 4,600 MT/s
- Max capacity
- 128 GB
- Channels
- 2-channel
- ECC / memory
- UDIMM
Power & VRM
- CPU power
- 115 W
- Phase config
- 4+4
- VRM stages
- 1H/2L
- EPS power
- 8
Storage & Expansion
- M.2 slots
- 2
- M.2 layout
- 1× PCIe 4.0 ×4, 1× PCIe 3.0 ×4
- SATA ports
- 4 SATA3
- PCIe ×16 slots
- 1× PCIe 4.0 ×16
- Other PCIe slots
- 2× PCIe 3.0 ×1
Ethernet & Wi-Fi
- Realtek RTL8111H
- 1 GbE
- Ethernet ports
- 1
- Wi-Fi
- Wi-Fi 6
USB & I/O
- Rear USB-A
- 4× 5 Gbps, 2× 10 Gbps
- Front USB 3 headers
- 1
- Front USB 2 headers
- 2
Audio & Video
- Audio codec
- Realtek ALC887
- Audio jacks
- 3
- HDMI
- 1 port
- DisplayPort
- None
- USB-C video
- None
Cooling, RGB & Design
- Fan headers
- 4
- 12V RGB headers
- 2
- 5V ARGB headers
- 1
- PCB colour
- Black
- Heatsink colour
- Gray
Onboard & Diagnostics
- TPM header
- Yes
Compare the Prime B550M-A WiFi against every other board on the motherboard comparison table. Not sure it fits your chip? The socket compatibility guide explains AM4 pairings.
Where to buy the Prime B550M-A WiFi
Every in-stock retailer offer we track, cheapest first.
Currently out of stock
The Prime B550M-A WiFi isn’t in stock at the retailers we track right now. Prices refresh daily, so check back — or compare other in-stock boards.
Browse in-stock motherboardsWhich CPUs fit the Prime B550M-A WiFi?
Compare all CPUs →In-stock AM4 processors this board can run, socket-matched and within its 115 W power budget, ranked by gaming value (performance per dollar).
| Processor | Cores | Gaming | From | |
|---|---|---|---|---|
| Ryzen 5 5500 AMD | 6/12 | 38.7 | $84.93 | |
| Ryzen 5 5600 AMD | 6/12 | 52.0 | $140.99 | |
| Ryzen 3 4100 AMD | 4/8 | 30.5 | $91.65 | |
| Ryzen 5 4500 AMD | 6/12 | 33.5 | $104.99 | |
| Ryzen 5 5600X AMD | 6/12 | 53.7 | $171.92 | |
| Ryzen 7 5700 AMD | 8/16 | 52.0 | $172.99 | |
| Ryzen 5 5600XT AMD | 6/12 | 53.7 | $189.99 | |
| Ryzen 7 5700X AMD | 8/16 | 55.3 | $209.00 |
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