MEG B550 Unify
The MSI MEG B550 Unify is a ATX AM4 motherboard on the B550 chipset. It supports DDR4 memory up to 5,600 MT/s and 4 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 MEG B550 Unify 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
576 W
The MEG B550 Unify is wired to feed about 576 W to the processor. The figure comes from its 14+2 power-stage (VRM) layout and 8+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
- ATX
Memory
- Type
- DDR4
- Slots
- 4
- Max speed
- 5,600 MT/s
- Max capacity
- 128 GB
- Channels
- 2-channel
- ECC / memory
- UDIMM
Power & VRM
- CPU power
- 576 W
- Phase config
- 14+2
- VRM stages
- 90A
- EPS power
- 8+8
Storage & Expansion
- M.2 slots
- 4
- M.2 layout
- 3× PCIe 4.0 ×4, 1× PCIe 3.0 ×4
- M.2 heatsinks
- All slots
- 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
- 4× USB 2.0, 3× 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 ALC1220P
- Audio jacks
- 5
- S/PDIF out
- Yes
- HDMI
- HDMI 2.1
- DisplayPort
- None
- USB-C video
- None
Cooling, RGB & Design
- Fan headers
- 8
- 12V RGB headers
- 1
- 5V ARGB headers
- 2
Onboard & Diagnostics
- BIOS Flashback
- Yes (rear)
- Diagnostics
- POST code display
- Onboard buttons
- Power, Reset, Clear CMOS
- TPM header
- Yes
Compare the MEG B550 Unify 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 MEG B550 Unify
Every in-stock retailer offer we track, cheapest first.
| Retailer | Availability | Price | Buy |
|---|---|---|---|
| Newegg | In stock | $221.35 |  |
The MEG B550 Unify starts from $221.35 across 1 retailer (Wi-Fi 6). Prices update daily from live stock.
Which CPUs fit the MEG B550 Unify?
Compare all CPUs →In-stock AM4 processors this board can run, socket-matched and within its 576 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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