Compare 3 motherboards

Side-by-side comparison of 3 motherboards
Specification	Asus PRIME B550M-K ARGB	ASUS Prime B550M-A/CSM AMD AM4	ASRock B550M Phantom Gaming 4
Price (new) (differs)	£82.15as of 22 Sep, 18:20	£81.74as of 22 Sep, 18:22	£81.64as of 22 Sep, 18:20
Amazon Warehouse offer	not stated	not stated	not stated
RRP (differs)	£99.99	not stated	£134.99
Price badge (differs)	not stated	Lowest we've recorded	not stated
First available on Amazon (differs)	Jan 2023 (3 yr 8 mo old)	Jun 2020 (6 yr 3 mo old)	Mar 2021 (5 yr 6 mo old)
Brand (differs)	ASUS	ASUS	ASRock
Socket	AM4	AM4	AM4
Chipset	B550	B550	B550
Form factor	Micro-ATX	Micro-ATX	Micro-ATX
Memory type	DDR4	DDR4	DDR4
RAM slots (differs)	2	not stated	not stated
Maximum RAM	not stated	not stated	not stated
Fastest RAM speed stated (differs)	not stated	not stated	4,733 MT/s
M.2 slots (differs)	2	not stated	not stated
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)	1GbE	1GbE	not stated
USB4 / Thunderbolt	not stated	not stated	not stated
Fastest USB-C port (differs)	5 Gbps	10 Gbps	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	not stated	not stated	not stated
ARGB headers (differs)	Yes	not stated	not stated
Video outputs (differs)	HDMI, DisplayPort	HDMI	not stated
Audio codec	not stated	not stated	not stated
Colour	not stated	not stated	not stated
Amazon sales rank (differs)	#88,742	#333,016	#66,888
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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