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Side-by-side comparison of 2 motherboards

Specification	MSI PRO B550M-B Motherboard	MSI PRO B550M-P Motherboard
Price (new) (differs)	£79.99as of 20 Sep, 06:22	£72.10as of 20 Sep, 06:22
RRP (differs)	£74.99	not stated
Price badge (differs)	not stated	Lowest we've recorded
First available on Amazon (differs)	Jun 2026 (2 mo old)	Jun 2026 (3 mo old)
RAM slots (differs)	not stated	4
Fastest RAM speed stated (differs)	not stated	4,400 MT/s
M.2 slots (differs)	not stated	2
Wired LAN (differs)	not stated	1GbE
Amazon sales rank (differs)	#4,931	#54,376
Buy	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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