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Side-by-side comparison of 2 motherboards
SpecificationMSI PRO B550M-P MotherboardASUS Prime B550M-A/CSM AMD AM4
Price (new) (differs)£85.98as of 5 Nov, 18:22£89.54as of 5 Nov, 18:22
Amazon Warehouse offernot statednot stated
RRPnot statednot stated
Price badgenot statednot stated
First available on Amazon (differs)Jun 2026 (4 mo old)Jun 2020 (6 yr 4 mo old)
Brand (differs)MSIASUS
SocketAM4AM4
ChipsetB550B550
Form factorMicro-ATXMicro-ATX
Memory typeDDR4DDR4
RAM slots (differs)4not stated
Maximum RAMnot statednot stated
Fastest RAM speed stated (differs)4,400 MT/snot stated
M.2 slots (differs)2not stated
Newest PCIe generation statedPCIe 4.0PCIe 4.0
PCIe 5.0 graphics slotnot statednot stated
PCIe 5.0 M.2 slotnot statednot stated
WiFiNone named in the listing titleNone named in the listing title
Bluetoothnot statednot stated
Wired LAN1GbE1GbE
USB4 / Thunderboltnot statednot stated
Fastest USB-C port (differs)not stated10 Gbps
SATA portsnot statednot stated
Power phases (as stated by the maker)not statednot stated
BIOS flashbacknot statednot stated
Debug LED / POST codenot statednot stated
ARGB headersnot statednot stated
Video outputs (differs)not statedHDMI
Audio codecnot statednot stated
Colournot statednot stated
Amazon sales rank (differs)#94,022#172,396
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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