Compare 2 motherboards

Side-by-side comparison of 2 motherboards

Specification	ASUS PRO B550M-C/CSM Business Motherboard Socket AM4	ASUS PRIME B550M-K WIFI
Price (new) (differs)	£145.63as of 6 Nov, 12:20	£104.99as of 6 Nov, 12:22
Amazon Warehouse offer	not stated	not stated
RRP (differs)	£143.99	not stated
Price badge (differs)	not stated	Lowest we've recorded
First available on Amazon (differs)	Jan 2021 (5 yr 10 mo old)	Jun 2026 (5 mo old)
Brand	ASUS	ASUS
Socket	AM4	AM4
Chipset	B550	B550
Form factor	Micro-ATX	Micro-ATX
Memory type	DDR4	DDR4
RAM slots	not stated	not stated
Maximum RAM	not stated	not stated
Fastest RAM speed stated	not stated	not stated
M.2 slots (differs)	2	not stated
Newest PCIe generation stated	PCIe 4.0	PCIe 4.0
PCIe 5.0 graphics slot	not stated	not stated
PCIe 5.0 M.2 slot	not stated	not stated
WiFi (differs)	None named in the listing title	WiFi 6
Bluetooth	not stated	not stated
Wired LAN (differs)	2.5GbE	not stated
USB4 / Thunderbolt	not stated	not stated
Fastest USB-C port (differs)	10 Gbps	not stated
SATA ports	not stated	not stated
Power phases (as stated by the maker)	not stated	not stated
BIOS flashback	not stated	not stated
Debug LED / POST code (differs)	not stated	Yes
ARGB headers (differs)	not stated	Yes
Video outputs	HDMI, DisplayPort	HDMI, DisplayPort
Audio codec	not stated	not stated
Colour (differs)	not stated	Black
Amazon sales rank (differs)	#224,958	#1,645
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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