B550M-ITX/ac
The ASRock B550M-ITX/ac is a Mini-ITX AM4 motherboard on the B550 chipset. It supports DDR4 memory up to 4,600 MT/s and 1 M.2 slot. 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-ITX/ac 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
199 W
The B550M-ITX/ac is wired to feed about 199 W to the processor. 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
- Mini-ITX
- MSRP
- $130.00
Memory
- Type
- DDR4
- Slots
- 2
- Max speed
- 4,600 MT/s
- Max capacity
- 64 GB
- Channels
- 2-channel
- ECC / memory
- UDIMM
Power & VRM
- CPU power
- 199 W
- Phase config
- 2x3+2
- VRM stages
- 50A DrMOS
- EPS power
- 8
Storage & Expansion
- M.2 slots
- 1
- M.2 layout
- 1× PCIe 4.0 ×4
- M.2 heatsinks
- All slots
- SATA ports
- 4 SATA3
- PCIe ×16 slots
- 1× PCIe 4.0 ×16
Ethernet & Wi-Fi
- Realtek RTL8111H
- 1 GbE
- Ethernet ports
- 1
- Wi-Fi
- Wi-Fi 5
USB & I/O
- Rear USB-A
- 2× USB 2.0, 3× 5 Gbps
- Rear USB-C
- 1× 5 Gbps
- Front USB 3 headers
- 1
- Front USB 2 headers
- 1
Audio & Video
- Audio codec
- Realtek ALC887
- Audio jacks
- 3
- HDMI
- 1 port
- DisplayPort
- 1 port
- USB-C video
- None
Cooling, RGB & Design
- Fan headers
- 3
- 12V RGB headers
- 1
- 5V ARGB headers
- 1
- PCB colour
- Black
- Heatsink colour
- Gray
Onboard & Diagnostics
Compare the B550M-ITX/ac 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-ITX/ac
Every in-stock retailer offer we track, cheapest first.
| Retailer | Availability | Price | Buy |
|---|---|---|---|
| Amazon | In stock | $99.99 |  |
The B550M-ITX/ac starts from $99.99 across 1 retailer (Wi-Fi 5). Prices update daily from live stock.
Which CPUs fit the B550M-ITX/ac?
Compare all CPUs →In-stock AM4 processors this board can run, socket-matched and within its 199 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 |
Affiliate disclosure: Some links on this page are affiliate links — MaxMyBuild may earn a commission at no extra cost to you if you buy through them. As an Amazon Associate, MaxMyBuild earns from qualifying purchases. For Amazon, current price and availability are shown on the Amazon product page; product prices and availability are accurate as of the date and time of purchase and are subject to change. Prices shown for other retailers are approximate and may differ at checkout. “Search” links are non-affiliate and provided for convenience only.