MAG B550M Mortar WiFi
The MSI MAG B550M Mortar WiFi is a Micro ATX AM4 motherboard on the B550 chipset. It supports DDR4 memory up to 4,400 MT/s and 2 M.2 slots. Full specs, power delivery, and current prices are below.
Prices update regularly and may differ at the retailer. This page contains affiliate links.
MaxMyBuild scores
How we score →How well the MAG B550M Mortar 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. Each factor is judged against what AM4 processors can use, so the score compares this board with the others you could buy for the same chip.
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
288 W
Overbuilt · 2.0x
Wired for about 288 W, roughly 2.0x the 142 W that the top Ryzen 9 chips pull, so nothing on this socket will run it short of power. The figure comes from its 2x4+2 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
- $170.00
Memory
- Type
- DDR4
- Slots
- 4
- Max speed
- 4,400 MT/s
- Max capacity
- 128 GB
- Channels
- 2-channel
- ECC / memory
- UDIMM
Power & VRM
- CPU power
- 288 W
- Phase config
- 2x4+2
- VRM stages
- 60A SPS
- EPS power
- 8
Storage & Expansion
- M.2 slots
- 2
- M.2 layout
- 1× PCIe 4.0 ×4, 1× PCIe 3.0 ×4
- M.2 heatsinks
- Slots 1
- SATA ports
- 6 SATA3
- PCIe ×16 slots
- 1× PCIe 4.0 ×16, 1× PCIe 3.0 ×4
- Other PCIe slots
- 2× PCIe 3.0 ×1
Ethernet & Wi-Fi
- Realtek RTL8125B
- 2.5 GbE
- Ethernet ports
- 1
- Wi-Fi
- Wi-Fi 6
USB & I/O
- Rear USB-A
- 2× USB 2.0, 2× 5 Gbps, 1× 10 Gbps
- Rear USB-C
- 1× 10 Gbps
- Front USB-C
- 1× 10Gbps
- Front USB 3 headers
- 1
- Front USB 2 headers
- 2
Audio & Video
- Audio codec
- Realtek ALC1200
- Audio jacks
- 5
- S/PDIF out
- Yes
- HDMI
- 1 port
- DisplayPort
- 1 port
- USB-C video
- None
Cooling, RGB & Design
- Fan headers
- 5
- 12V RGB headers
- 1
- 5V ARGB headers
- 2
- PCB colour
- Black
- Heatsink colour
- Gray
Onboard & Diagnostics
- BIOS Flashback
- Yes (rear)
- Diagnostics
- Debug LEDs
- TPM header
- Yes
Compare the MAG B550M Mortar 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 MAG B550M Mortar WiFi
Every in-stock retailer offer we track, cheapest first.
| Retailer | Availability | Price | Updated | Buy |
|---|---|---|---|---|
| Newegg | In stock | $132.51 |  |
The MAG B550M Mortar WiFi starts from $132.51 across 1 retailer (Wi-Fi 6). Prices update daily from live stock.
Which CPUs fit the MAG B550M Mortar WiFi?
Compare all CPUs →In-stock AM4 processors this board can run, socket-matched and within its 288 W power budget, ranked by gaming value (performance per dollar).
| Processor | Cores | Gaming | From | |
|---|---|---|---|---|
| Ryzen 5 5600 AMD | 6/12 | 52.0 | $103.23 | |
| Ryzen 5 2400G AMD | 4/8 | 24.6 | $54.17 | |
| Ryzen 7 3700X AMD | 8/16 | 41.5 | $93.73 | |
| Ryzen 5 5500 AMD | 6/12 | 38.7 | $87.95 | |
| Ryzen 5 3600X AMD | 6/12 | 37.5 | $86.11 | |
| Ryzen 5 4500 AMD | 6/12 | 33.5 | $87.72 | |
| Ryzen 5 3600 AMD | 6/12 | 37.6 | $101.31 | |
| Ryzen 5 5600X AMD | 6/12 | 53.7 | $149.99 |
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