Compare 3 motherboards

Side-by-side comparison of 3 motherboards
Specification	MSI PRO B840M-B Motherboard	MSI PRO B840M-B Motherboard	ASUS PRIME B840M-A WIFI AMD B840 mATX motherboard
Price (new) (differs)	not stated	£89.99as of 20 Sep, 06:22	£109.99as of 20 Sep, 06:21
Amazon Warehouse offer (differs)	£80.93 (Used - Like New)as of 20 Sep, 06:22	not stated	not stated
RRP (differs)	not stated	£89.99	£193.79
Price badge	not stated	not stated	not stated
First available on Amazon (differs)	Aug 2025 (1 yr 1 mo old)	Jun 2025 (1 yr 2 mo old)	Jan 2025 (1 yr 8 mo old)
Brand (differs)	MSI	MSI	ASUS
Socket	AM5	AM5	AM5
Chipset	B840	B840	B840
Form factor	Micro-ATX	Micro-ATX	Micro-ATX
Memory type	DDR5	DDR5	DDR5
RAM slots (differs)	2	2	not stated
Maximum RAM	not stated	not stated	not stated
Fastest RAM speed stated (differs)	8,000 MT/s	8,000 MT/s	not stated
M.2 slots (differs)	2	2	3
Newest PCIe generation stated	PCIe 4.0	PCIe 4.0	PCIe 4.0
PCIe 5.0 graphics slot	not stated	not stated	not stated
PCIe 5.0 M.2 slot	not stated	not stated	not stated
WiFi (differs)	None named in the listing title	None named in the listing title	WiFi 6E
Bluetooth	not stated	not stated	not stated
Wired LAN	2.5GbE	2.5GbE	2.5GbE
USB4 / Thunderbolt	not stated	not stated	not stated
Fastest USB-C port (differs)	not stated	not stated	5 Gbps
SATA ports	not stated	not stated	not stated
Power phases (as stated by the maker)	not stated	not stated	not stated
BIOS flashback (differs)	not stated	not stated	Yes
Debug LED / POST code (differs)	not stated	not stated	Yes
ARGB headers (differs)	not stated	not stated	Yes
Video outputs (differs)	not stated	not stated	HDMI, DisplayPort
Audio codec	not stated	not stated	not stated
Colour	not stated	not stated	not stated
Amazon sales rank (differs)	#136,129	#1,062	#30,096
Buy	See it 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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