B550M Pro4
The ASRock B550M Pro4 is a Micro ATX AM4 motherboard on the B550 chipset. It supports DDR4 memory up to 4,533 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 B550M Pro4 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
151 W
Sufficient · 1.0x
Wired for about 151 W, enough for every processor on this socket including the top Ryzen 9 chips at their 142 W ceiling, without a lot left over. The figure comes from its 2x3+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
- $115.00
Memory
- Type
- DDR4
- Slots
- 4
- Max speed
- 4,533 MT/s
- Max capacity
- 128 GB
- Channels
- 2-channel
- ECC / memory
- UDIMM
Power & VRM
- CPU power
- 151 W
- Phase config
- 2x3+2
- VRM stages
- 1H/1L
- EPS power
- 8
Storage & Expansion
- M.2 slots
- 2
- M.2 layout
- 1× PCIe 4.0 ×4, 1× PCIe 3.0 ×2
- 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
- 1× PCIe 3.0 ×1
Ethernet & Wi-Fi
- Realtek RTL8111H
- 1 GbE
- Ethernet ports
- 1
- Wi-Fi
- None
USB & I/O
- Rear USB-A
- 2× USB 2.0, 4× 5 Gbps, 1× 10 Gbps
- Rear USB-C
- 1× 10 Gbps
- Front USB 3 headers
- 2
- Front USB 2 headers
- 2
Audio & Video
- Audio codec
- Realtek ALC1200
- Audio jacks
- 3
- HDMI
- 1 port
- DisplayPort
- 1 port
- USB-C video
- None
Cooling, RGB & Design
- Fan headers
- 6
- 12V RGB headers
- 2
- 5V ARGB headers
- 2
- PCB colour
- Black
- Heatsink colour
- Gray
Onboard & Diagnostics
- Diagnostics
- Debug LEDs
- TPM header
- Yes
Compare the B550M Pro4 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 B550M Pro4
Every in-stock retailer offer we track, cheapest first.
| Retailer | Availability | Price | Updated | Buy |
|---|---|---|---|---|
| Amazon | In stock | $89.99 |  | |
| Newegg | In stock | $99.99 |  |
The B550M Pro4 starts from $89.99 across 2 retailers (No onboard Wi-Fi). Prices update daily from live stock.
Which CPUs fit the B550M Pro4?
Compare all CPUs →In-stock AM4 processors this board can run, socket-matched and within its 151 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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