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Side-by-side comparison of 2 motherboards
SpecificationASUS Prime B550M-A/CSM AMD AM4ASUS PRIME B550M-A WIFI II
Price (new) (differs)£89.54as of 5 Nov, 18:22£89.99as of 5 Nov, 18:21
Amazon Warehouse offernot statednot stated
RRP (differs)not stated£130.99
Price badgenot statednot stated
First available on Amazon (differs)Jun 2020 (6 yr 4 mo old)Dec 2021 (4 yr 11 mo old)
BrandASUSASUS
SocketAM4AM4
ChipsetB550B550
Form factorMicro-ATXMicro-ATX
Memory typeDDR4DDR4
RAM slots (differs)not stated4
Maximum RAMnot statednot stated
Fastest RAM speed statednot statednot stated
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 6
Bluetoothnot statednot stated
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 headers (differs)not statedYes
Video outputsHDMIHDMI
Audio codecnot statednot stated
Colournot statednot stated
Amazon sales rank (differs)#172,396#1,641
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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