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Green mini-ITX board with silver heatsinks and rear I/O shield

ASRock

ASRock B550M-ITX/AC AMD motherboard

SKU CH-V3VW-0JETW MPN B550M-ITX/AC

Mini ITX AM4 board supports 3rd Gen Ryzen, dual-channel DDR4 up to 64 GB, PCIe 4.0 M.2, Wi-Fi and 7.1 audio

  • ProcessorSupports 3rd Gen AMD AM4 Ryzen / future AMD Ryzen Processors
  • ChipsetAMD B550
  • Form factorMini ITX
  • CPU socketAM4
  • Memory slot count2 × 288pin (DDR4)
  • Supported memoryAMD Ryzen series CPUs (Matisse) support DDR4 4600+(OC)/ 4533

Model B550M-ITX/AC

  • Compact mini-ITX design fits small-form-factor builds
  • AM4 socket supports 3rd Gen Ryzen and future AMD Ryzen processors
  • B550 chipset enables PCIe 4.0 x16 graphics and Gen4 M.2 storage
  • Dual-channel DDR4 up to 64 GB with XMP 2.0 profiles
  • Integrated WiFi 802.11ac plus Gigabit LAN for wireless and wired connectivity

Compact AMD Ryzen Platform

The ASRock B550M-ITX/AC is a Mini ITX motherboard for the AM4 socket, built around the AMD B550 chipset. It supports 3rd Gen AMD Ryzen processors and future Ryzen CPUs, with a BIOS update available for Zen 3 Ryzen 5000 series. The board fits small-form-factor cases while keeping full desktop connectivity.

Sustained Power Delivery

An 8 Power Phase design uses premium 60A power chokes to keep Vcore voltage stable during long workloads. The chokes raise saturation current up to three times over traditional parts, helping the VRM run cooler when the CPU holds high clocks for extended periods. This layout targets consistent output rather than short bursts.

PCIe 4.0 M.2 for Fast Storage

One Hyper M.2 socket accepts 2280 M Key modules and runs at PCIe 4.0 x4 with Matisse CPUs or PCIe 3.0 x4 with Renoir APUs. It also supports SATA3 6.0 Gb/s M.2 drives and NVMe SSDs as boot devices. This single slot decides whether the board can host a high-speed system drive in a compact build.

How it compares

Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.

Price $80.99
Cheaper than about 82% of the 1,906 comparable items (median $224.49).

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameASRock
Model nameB550M-ITX/AC
Processor
CPU socketAM4
ChipsetAMD B550
Memory
Memory slot count2 × 288pin (DDR4)
Supported memoryAMD Ryzen series CPUs (Matisse) support DDR4 4600+(OC)/ 4533(OC)/ 4466(OC)/ 4400(OC)/ 4333(OC)/ 4333(OC)/ 4266(OC)/ 4200(OC)/ 4133(OC)/ 4000(OC)/ 3866(OC)/ 3800(OC)/ 3733(OC)/ 3600(OC)/ 3466(OC)/ 3200/ 2933/ 2667/ 2400/ 2133 ECC & non-ECC, un-buffered memory*
AMD Ryzen series APUs support DDR4 4733+(OC)/ 4666(OC)/ 4600(OC)/ 4533(OC)/ 4466(OC)/ 4400(OC)/ 4333(OC)/ 4266(OC)/ 4200(OC)/ 4133(OC)/ 4000(OC)/ 3866(OC)/ 3800(OC)/ 3733(OC)/ 3600(OC)/ 3466(OC)/ 3200/ 2933/ 2667/ 2400/ 2133 ECC & non-ECC, un-buffered memory*
* For Ryzen Series CPUs (Picasso and Raven Ridge), ECC is only support
Memory channelsDual Channel
Memory profilesIntel XMP 2.0
Storage
SATA ports4 x SATA3 6.0 Gb/s Connectors, support RAID, NCQ, AHCI and Hot Plug
M.2 slots1 x Hyper M.2 Socket (M2_1), supports M Key type 2280 M.2 SATA3 6.0Gb/s module and M.2 PCI Express module up to Gen4 × 4 (64Gb/s) (with Matisse) or Gen3 × 4 (32Gb/s) (with Renoir)*
* Supports NVMe SSD as boot disks
* Supports ASRock U.2 Kit
SATA and RAID support0/1/10
Audio & video
Audio chipRealtek ALC887
Sound channels7.1 Channels
Connectivity
Ethernet controllerRealtek RTL8111H
Maximum network speed1 Gbit/s
Wi-Fi standardIntel 802.11ac WiFi Module
Supports IEEE 802.11a/b/g/n/ac
Supports Dual-Band (2.4/5 GHz)
Supports high speed wireless connections up to 433 Mbit/s
Bluetooth supportSupports Bluetooth 4.2+ High speed class II
Ports & slots
Additional slots1 x Vertical M.2 Socket (Key E) with the bundled WiFi-802.11ac module (on the rear I/O)
Rear panel ports2 x Antenna Ports
1 x PS/2 Mouse/Keyboard Port
1 x HDMI Port
1 x DisplayPort 1.4
2 x USB 2.0 Ports (Supports ESD Protection)
3 x USB 3.2 Gen1 Type-A Ports (Supports ESD Protection)
1 x USB 3.2 Gen1 Type-C Port (Supports ESD Protection)
1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
HD Audio Jacks: Line in / Front Speaker / Microphone
Onboard USB headers1 x USB 2.0 Header (Supports 2 USB 2.0 ports) (Supports ESD Protection)
1 x USB 3.2 Gen1 Header (Supports 2 USB 3.2 Gen1 ports) (Supports ESD Protection)
Power
Power connectors1 × 24-pin ATX Power Connector
1 × 8-pin 12 V Power Connector
Size & build
Form factorMini ITX
Width and length6.7 in × 6.7 in
Shipping weight0.84 kg
Package size324 × 292 × 64 mm
Compatibility
Windows 11 supportSupported
In the box
In the boxAccessories:
- Quick Installation Guide, Support CD, I/O Shield
- 2 x SATA Data Cables
- 2 x ASRock WiFi 2.4/5 GHz Antennas
More details
LightingRGB

Other versions of this model

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Questions about this item

Does the board's 8 power-phase design and 60 A chokes keep VRM temperatures low during sustained all-core loads?

The 8 power-phase design with premium 60 A chokes delivers smooth power to the CPU and is rated for lower operating temperatures under heavy loads.

Which components must I already have to complete a build around this AM4 mini-ITX board?

You need an AM4 Ryzen processor, DDR4 memory modules, a compatible mini-ITX case and power supply, and storage drives such as SATA SSDs or an M.2 2280 device.

Can I reuse my existing SATA drives and PCIe 3.0 add-in cards with this B550 board?

Four SATA3 6.0 Gb/s ports support existing SATA drives, and the PCIe 4.0 x16 slot is backward compatible with PCIe 3.0 cards.

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