Compare 3 motherboards

Side-by-side comparison of 3 motherboards
Specification	MSI B550-A PRO Motherboard ATX	MSI B550-A PRO ProSeries Motherboard	ASUS PRIME B550-PLUS
Price (new) (differs)	£89.99as of 20 Sep, 06:20	£89.64as of 20 Sep, 06:20	£92.66as of 20 Sep, 06:20
Amazon Warehouse offer	not stated	not stated	not stated
RRP (differs)	£104.99	not stated	£124.56
Price badge (differs)	90-day low	30-day low	90-day low
First available on Amazon (differs)	Jun 2020 (6 yr 3 mo old)	Oct 2025 (10 mo old)	Jan 2022 (4 yr 8 mo old)
Brand (differs)	MSI	MSI	ASUS
Socket	AM4	AM4	AM4
Chipset	B550	B550	B550
Form factor	ATX	ATX	ATX
Memory type	DDR4	DDR4	DDR4
RAM slots	not stated	not stated	not stated
Maximum RAM (differs)	128 GB	128 GB	not stated
Fastest RAM speed stated (differs)	4,400 MT/s	4,400 MT/s	not stated
M.2 slots (differs)	not stated	not stated	2
Newest PCIe generation stated	PCIe 4.0	PCIe 4.0	PCIe 4.0
PCIe 5.0 graphics slot	not stated	not stated	not stated
PCIe 5.0 M.2 slot	not stated	not stated	not stated
WiFi	None named in the listing title	None named in the listing title	None named in the listing title
Bluetooth	not stated	not stated	not stated
Wired LAN (differs)	not stated	not stated	1GbE
USB4 / Thunderbolt	not stated	not stated	not stated
Fastest USB-C port (differs)	not stated	not stated	10 Gbps
SATA ports	not stated	not stated	not stated
Power phases (as stated by the maker)	not stated	not stated	not stated
BIOS flashback (differs)	Yes	not stated	not stated
Debug LED / POST code	not stated	not stated	not stated
ARGB headers (differs)	Yes	not stated	Yes
Video outputs (differs)	HDMI	HDMI, DisplayPort	not stated
Audio codec	not stated	not stated	not stated
Colour	not stated	not stated	not stated
Amazon sales rank (differs)	#1,256	#11,171	#1,413
Buy	Check price on Amazon	Check price on Amazon	Check price on Amazon

Highlighted rows differ between these boards. “Not stated” means the Amazon listing does not mention it: the board may still have it, so check the maker’s specification. Power phases are printed as stated by the maker and are not comparable between brands. Prices are the new price on Amazon.co.uk at the time shown; the price on Amazon when you buy is the one that applies.

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