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, 06:22	£144.98as of 20 Sep, 06:22
RRP (differs)	not stated	£377.99
First available on Amazon (differs)	Feb 2026 (6 mo old)	Apr 2025 (1 yr 5 mo old)
Brand (differs)	ASRock	ASUS
RAM slots (differs)	4	not stated
Fastest RAM speed stated (differs)	8,000 MT/s	not stated
M.2 slots (differs)	not stated	3
PCIe 5.0 graphics slot (differs)	Yes	not stated
PCIe 5.0 M.2 slot (differs)	Yes	not stated
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
ARGB headers (differs)	not stated	Yes
Audio codec (differs)	ALC897	not stated
Amazon sales rank (differs)	#36,335	#13,264
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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