Compare 3 motherboards

Side-by-side comparison of 3 motherboards
Specification	Asrock B550M Steel Legend Motherboard	ASUS Prime B550M-A AC AMD AM4	ASUS PRIME B550M-K WIFI
Price (new) (differs)	£244.46as of 20 Sep, 06:20	£156.92as of 20 Sep, 06:20	£150.13as of 20 Sep, 06:22
Amazon Warehouse offer	not stated	not stated	not stated
RRP	not stated	not stated	not stated
Price badge (differs)	not stated	90-day low	Lowest we've recorded
First available on Amazon (differs)	Jul 2020 (6 yr 2 mo old)	Jul 2021 (5 yr 2 mo old)	Jun 2026 (3 mo old)
Brand (differs)	ASRock	ASUS	ASUS
Socket	AM4	AM4	AM4
Chipset	B550	B550	B550
Form factor	Micro-ATX	Micro-ATX	Micro-ATX
Memory type	DDR4	DDR4	DDR4
RAM slots	not stated	not stated	not stated
Maximum RAM	not stated	not stated	not stated
Fastest RAM speed stated	not stated	not stated	not stated
M.2 slots (differs)	not stated	2	not stated
Newest PCIe generation stated (differs)	not stated	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 (differs)	None named in the listing title	Yes (generation not stated)	WiFi 6
Bluetooth	not stated	not stated	not stated
Wired LAN (differs)	2.5GbE	1GbE	not stated
USB4 / Thunderbolt	not stated	not stated	not stated
Fastest USB-C port	not stated	not stated	not stated
SATA ports	not stated	not stated	not stated
Power phases (as stated by the maker)	not stated	not stated	not stated
BIOS flashback	not stated	not stated	not stated
Debug LED / POST code (differs)	not stated	not stated	Yes
ARGB headers (differs)	not stated	Yes	Yes
Video outputs (differs)	not stated	HDMI	HDMI, DisplayPort
Audio codec (differs)	ALC1200	not stated	not stated
Colour (differs)	not stated	not stated	Black
Amazon sales rank (differs)	#147,162	#86,197	#1,431
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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