ASUS PRIME B550M-A AM4 Motherboard

ASUS PRIME B550M-A AM4 Motherboard

Item No. 10210517
Form factor: microATX
Socket: AMD AM4
Chipset: AMD B550
Memory: DIMM x 4 / Max RAM: 128 GB
AMD CrossFire x 2
3 year guarantee
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Form factor: microATX
Socket: AMD AM4
Chipset: AMD B550
Memory: DIMM x 4 / Max RAM: 128 GB
AMD CrossFire x 2
3 year guarantee
Product code: 695900

AM4 socket 

It might be smaller than standard, but the Asus PRIME B550M-A AM4 Motherboard still gives you all the connectivity you need to build a great PC. Compatible with 3rd generation AMD Ryzen processors, you can choose from a wide range and even make the most of inbuilt Vega graphics if you want.

With the support of DDR4 memory, you can complement your choice of processor with up to 128 GB of RAM. Giving you the opportunity to expand at any time, you have 4 DIMM slots available to use.

Impressive storage

Compatible with the latest M.2 storage, you can add a superfast SSD to your build - boot up in seconds and jump straight back into your latest project without having to wait ages as things load. And because your SATA ports are freed up, you can pile up huge capacity hard drives and save all your files, important documents and images.

Sync all your lighting

The PRIME B550M-A has built-in RGB LED lighting, which is compatible with any other ASUS Aura RGB accessories you have. You can sync them all to the same colour, or pick from a huge range of patterns.

Technical specifications for ASUS PRIME B550M-A AM4 Motherboard


Form factor
AMD B550
Processor models supported
3rd generation AMD Ryzen processors
Memory slots
4 x DIMM (Max RAM: 128 GB)
Memory standard
Multi-GPU support
AMD CrossFire x 2
Operating systems supported
- Windows 10 (64-bit)
- Windows 11


Video output
- HDMI x 1
- DVI x 1
- VGA x 1
Ethernet port x 1
Audio jacks x 3
- USB 3.2 Gen 2 x 2
- USB 3.2 Gen 1 x 4
Other external connections
PS/2 port x 1


- 128 Mb Flash ROM
Expansion slots
PCIe 4.0 (x16) x 1
Storage slots
- SATA x 4 (6 GB/s)
- M.2 x 2
- 4-pin CPU fan header x 1
- 4-pin CPU OPT fan header x 1
- 4-pin chassis fan headers x 2
- 24-pin EATX x 1
- 8-pin ATX 12 V x 1
Other internal connections
- Aura RGB Strip header x 2
- TPM header x 1
- COM port connector x 1
- Front panel audio connector x 1
- System panel x 1
- Clear CMOS jumper x 1
- Speaker connector x 1
- USB 3.2 Gen 1 x 1 (supports additional 2 USB 3.2 Gen 1 ports)
- USB 2.0 x 2 (supports additional 4 USB 2.0 ports)


Box contents
- Asus PRIME B550M-A AM4 Motherboard
- I/O Shield
- SATA cables x 2
- M.2 screw package
- Supporting DVD
- User manual
956 g
Manufacturer’s guarantee
3 years
51 x 260 x 270 mm (H x W x D)