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Side-by-side comparison of 2 motherboards
SpecificationASUS Prime B550M-A/CSM AMD AM4MSI PRO B550M-P WIFI6E Motherboard
Price (new) (differs)£89.54as of 5 Nov, 18:22£89.99as of 5 Nov, 18:22
Amazon Warehouse offer (differs)not stated£82.72 (Used - Like New)as of 5 Nov, 18:22
RRP (differs)not stated£89.99
Price badge (differs)not statedLowest we've recorded
First available on Amazon (differs)Jun 2020 (6 yr 4 mo old)Jun 2026 (4 mo old)
Brand (differs)ASUSMSI
SocketAM4AM4
ChipsetB550B550
Form factorMicro-ATXMicro-ATX
Memory typeDDR4DDR4
RAM slots (differs)not stated4
Maximum RAMnot statednot stated
Fastest RAM speed stated (differs)not stated4,400 MT/s
M.2 slots (differs)not stated2
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
Bluetooth (differs)not stated5.3
Wired LAN1GbE1GbE
USB4 / Thunderboltnot statednot stated
Fastest USB-C port (differs)10 Gbpsnot stated
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)HDMInot stated
Audio codecnot statednot stated
Colournot statednot stated
Amazon sales rank (differs)#172,396#1,268
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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