Compare 2 motherboards

Side-by-side comparison of 2 motherboards

Specification	B850M Challenger AM5 mATX HDMI/DP	ASUS PRIME B850M-A-CSM
Price (new) (differs)	£142.23as of 20 Sep, 02:43	£144.98as of 20 Sep, 02:43
Amazon Warehouse offer	not stated	not stated
RRP (differs)	not stated	£377.99
Price badge	not stated	not stated
First available on Amazon (differs)	Feb 2026 (6 mo old)	Apr 2025 (1 yr 5 mo old)
Brand (differs)	ASRock	ASUS
Socket	AM5	AM5
Chipset	B850	B850
Form factor	Micro-ATX	Micro-ATX
Memory type	DDR5	DDR5
RAM slots (differs)	4	not stated
Maximum RAM	not stated	not stated
Fastest RAM speed stated (differs)	8,000 MT/s	not stated
M.2 slots (differs)	not stated	3
Newest PCIe generation stated	PCIe 5.0	PCIe 5.0
PCIe 5.0 graphics slot (differs)	Yes	not stated
PCIe 5.0 M.2 slot (differs)	Yes	not stated
WiFi	None named in the listing title	None named in the listing title
Bluetooth	not stated	not stated
Wired LAN	2.5GbE	2.5GbE
USB4 / Thunderbolt	not stated	not stated
Fastest USB-C port	5 Gbps	5 Gbps
SATA ports (differs)	4	not stated
Power phases (as stated by the maker) (differs)	8+1+1	not stated
BIOS flashback (differs)	not stated	Yes
Debug LED / POST code	not stated	not stated
ARGB headers (differs)	not stated	Yes
Video outputs	HDMI, DisplayPort	HDMI, DisplayPort
Audio codec (differs)	ALC897	not stated
Colour	not stated	not stated
Amazon sales rank (differs)	#35,139	#14,478
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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