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Side-by-side comparison of 2 motherboards
SpecificationASUS PRIME B550M-A WIFI IIAsus PRIME B550M-K ARGB
Price (new) (differs)£87.99as of 20 Sep, 06:20£82.15as of 20 Sep, 06:20
Amazon Warehouse offernot statednot stated
RRP (differs)£130.99£99.99
Price badgenot statednot stated
First available on Amazon (differs)Dec 2021 (4 yr 9 mo old)Jan 2023 (3 yr 8 mo old)
BrandASUSASUS
SocketAM4AM4
ChipsetB550B550
Form factorMicro-ATXMicro-ATX
Memory typeDDR4DDR4
RAM slots (differs)42
Maximum RAMnot statednot stated
Fastest RAM speed statednot statednot stated
M.2 slots22
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)WiFi 6None named in the listing title
Bluetoothnot statednot stated
Wired LAN1GbE1GbE
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 flashbacknot statednot stated
Debug LED / POST codenot statednot stated
ARGB headersYesYes
Video outputs (differs)HDMIHDMI, DisplayPort
Audio codecnot statednot stated
Colournot statednot stated
Amazon sales rank (differs)#1,413#84,725
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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