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Side-by-side comparison of 2 motherboards
SpecificationASUS Prime B550M-A/CSM AMD AM4Asus PRIME B550M-K ARGB
Price (new) (differs)£81.74as of 22 Sep, 18:22£82.15as of 22 Sep, 18:20
Amazon Warehouse offernot statednot stated
RRP (differs)not stated£99.99
Price badge (differs)Lowest we've recordednot stated
First available on Amazon (differs)Jun 2020 (6 yr 3 mo old)Jan 2023 (3 yr 8 mo old)
BrandASUSASUS
SocketAM4AM4
ChipsetB550B550
Form factorMicro-ATXMicro-ATX
Memory typeDDR4DDR4
RAM slots (differs)not stated2
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
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)10 Gbps5 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 headers (differs)not statedYes
Video outputs (differs)HDMIHDMI, DisplayPort
Audio codecnot statednot stated
Colournot statednot stated
Amazon sales rank (differs)#333,016#88,742
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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