Compare 3 motherboards

Side-by-side comparison of 3 motherboards
Specification	ASUS PRIME B850M-A-CSM	ASRock B850M Rock WiFi Socket AM5 Micro-ATX Motherboard	B850M Challenger WiFi AM5 mATX HDMI/DP
Price (new) (differs)	£144.98as of 5 Nov, 18:22	£144.04as of 5 Nov, 18:22	£148.66as of 5 Nov, 18:22
Amazon Warehouse offer	not stated	not stated	not stated
RRP (differs)	£377.99	£270.99	£311.99
Price badge	not stated	not stated	not stated
First available on Amazon (differs)	Apr 2025 (1 yr 7 mo old)	Jan 2026 (9 mo old)	Feb 2026 (8 mo old)
Brand (differs)	ASUS	ASRock	ASRock
Socket	AM5	AM5	AM5
Chipset	B850	B850	B850
Form factor	Micro-ATX	Micro-ATX	Micro-ATX
Memory type	DDR5	DDR5	DDR5
RAM slots (differs)	not stated	2	4
Maximum RAM	not stated	not stated	not stated
Fastest RAM speed stated (differs)	not stated	8,200 MT/s	8,000 MT/s
M.2 slots (differs)	3	1	not stated
Newest PCIe generation stated	PCIe 5.0	PCIe 5.0	PCIe 5.0
PCIe 5.0 graphics slot (differs)	not stated	Yes	Yes
PCIe 5.0 M.2 slot (differs)	not stated	Yes	Yes
WiFi (differs)	None named in the listing title	WiFi 6E	WiFi 7
Bluetooth (differs)	not stated	5.3	5.4
Wired LAN	2.5GbE	2.5GbE	2.5GbE
USB4 / Thunderbolt	not stated	not stated	not stated
Fastest USB-C port (differs)	5 Gbps	5 Gbps	not stated
SATA ports (differs)	not stated	4	not stated
Power phases (as stated by the maker) (differs)	not stated	6+1+1	8+1+1
BIOS flashback (differs)	Yes	not stated	not stated
Debug LED / POST code	not stated	not stated	not stated
ARGB headers (differs)	Yes	not stated	not stated
Video outputs	HDMI, DisplayPort	HDMI, DisplayPort	HDMI, DisplayPort
Audio codec (differs)	not stated	not stated	ALC897
Colour	not stated	not stated	not stated
Amazon sales rank (differs)	#9,626	#50,419	#50,419
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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