Compare 4 motherboards

Side-by-side comparison of 4 motherboards
Specification	ASUS Prime B550M-K AMD B550	MSI PRO B550M-B Motherboard	MSI PRO B550M-P Motherboard	Gigabyte B550M DS3H R2 Motherboard
Price (new) (differs)	£84.41as of 5 Nov, 18:21	£81.19as of 5 Nov, 18:22	£85.98as of 5 Nov, 18:22	£79.99as of 5 Nov, 18:23
Amazon Warehouse offer	not stated	not stated	not stated	not stated
RRP (differs)	£134.99	£74.99	not stated	£179.99
Price badge (differs)	not stated	not stated	not stated	30-day low
First available on Amazon (differs)	Jan 2022 (4 yr 10 mo old)	Jun 2026 (4 mo old)	Jun 2026 (4 mo old)	Apr 2025 (1 yr 6 mo old)
Brand (differs)	ASUS	MSI	MSI	Gigabyte
Socket	AM4	AM4	AM4	AM4
Chipset	B550	B550	B550	B550
Form factor	Micro-ATX	Micro-ATX	Micro-ATX	Micro-ATX
Memory type	DDR4	DDR4	DDR4	DDR4
RAM slots (differs)	not stated	2	4	4
Maximum RAM	not stated	not stated	not stated	not stated
Fastest RAM speed stated (differs)	4,400 MT/s	4,600 MT/s	4,400 MT/s	4,733 MT/s
M.2 slots	2	2	2	2
Newest PCIe generation stated	PCIe 4.0	PCIe 4.0	PCIe 4.0	PCIe 4.0
PCIe 5.0 graphics slot	not stated	not stated	not stated	not stated
PCIe 5.0 M.2 slot	not stated	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	None named in the listing title
Bluetooth	not stated	not stated	not stated	not stated
Wired LAN	1GbE	1GbE	1GbE	1GbE
USB4 / Thunderbolt	not stated	not stated	not stated	not stated
Fastest USB-C port	not stated	not stated	not stated	not stated
SATA ports	not stated	not stated	not stated	not stated
Power phases (as stated by the maker) (differs)	not stated	not stated	not stated	5+3
BIOS flashback	not stated	not stated	not stated	not stated
Debug LED / POST code	not stated	not stated	not stated	not stated
ARGB headers	not stated	not stated	not stated	not stated
Video outputs (differs)	HDMI	not stated	not stated	HDMI, DisplayPort
Audio codec	not stated	not stated	not stated	not stated
Colour	not stated	not stated	not stated	not stated
Amazon sales rank (differs)	#1,641	#6,175	#94,022	#1,849
Buy	Check price on Amazon	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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