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Side-by-side comparison of 2 motherboards
SpecificationMSI PRO B840M-B MotherboardASUS PRIME B840M-A WIFI AMD B840 mATX motherboard
Price (new) (differs)£89.99as of 20 Sep, 06:22£109.99as of 20 Sep, 06:21
Amazon Warehouse offernot statednot stated
RRP (differs)£89.99£193.79
Price badgenot statednot stated
First available on Amazon (differs)Jun 2025 (1 yr 2 mo old)Jan 2025 (1 yr 8 mo old)
Brand (differs)MSIASUS
SocketAM5AM5
ChipsetB840B840
Form factorMicro-ATXMicro-ATX
Memory typeDDR5DDR5
RAM slots (differs)2not stated
Maximum RAMnot statednot stated
Fastest RAM speed stated (differs)8,000 MT/snot stated
M.2 slots (differs)23
Newest PCIe generation statedPCIe 4.0PCIe 4.0
PCIe 5.0 graphics slotnot statednot stated
PCIe 5.0 M.2 slotnot statednot stated
WiFi (differs)None named in the listing titleWiFi 6E
Bluetoothnot statednot stated
Wired LAN2.5GbE2.5GbE
USB4 / Thunderboltnot statednot stated
Fastest USB-C port (differs)not stated5 Gbps
SATA portsnot statednot stated
Power phases (as stated by the maker)not statednot stated
BIOS flashback (differs)not statedYes
Debug LED / POST code (differs)not statedYes
ARGB headers (differs)not statedYes
Video outputs (differs)not statedHDMI, DisplayPort
Audio codecnot statednot stated
Colournot statednot stated
Amazon sales rank (differs)#1,062#30,096
BuyCheck price on AmazonCheck 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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