Compare 3 motherboards

Side-by-side comparison of 3 motherboards
Specification	ASUS PRIME B850M-A-CSM	MSI PRO B850M-P WiFi Motherboard	B850M Challenger AM5 mATX HDMI/DP
Price (new) (differs)	£144.98as of 20 Sep, 06:22	£143.94as of 20 Sep, 06:22	£142.23as of 20 Sep, 06:22
Amazon Warehouse offer	not stated	not stated	not stated
RRP (differs)	£377.99	not stated	not stated
Price badge (differs)	not stated	90-day low	not stated
First available on Amazon (differs)	Apr 2025 (1 yr 5 mo old)	May 2025 (1 yr 4 mo old)	Feb 2026 (6 mo old)
Brand (differs)	ASUS	MSI	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	4	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	3	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 7	None named in the listing title
Bluetooth (differs)	not stated	5.4	not stated
Wired LAN (differs)	2.5GbE	5GbE	2.5GbE
USB4 / Thunderbolt	not stated	not stated	not stated
Fastest USB-C port (differs)	5 Gbps	10 Gbps	5 Gbps
SATA ports (differs)	not stated	not stated	4
Power phases (as stated by the maker) (differs)	not stated	not stated	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 (differs)	HDMI, DisplayPort	not stated	HDMI, DisplayPort
Audio codec (differs)	not stated	not stated	ALC897
Colour	not stated	not stated	not stated
Amazon sales rank (differs)	#13,264	#153,588	#36,335
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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