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Side-by-side comparison of 2 motherboards
SpecificationASUS Prime B550M-A AC AMD AM4ASUS PRIME B550M-K WIFI
Price (new) (differs)£156.92as of 20 Sep, 06:20£150.13as of 20 Sep, 06:22
Amazon Warehouse offernot statednot stated
RRPnot statednot stated
Price badge (differs)90-day lowLowest we've recorded
First available on Amazon (differs)Jul 2021 (5 yr 2 mo old)Jun 2026 (3 mo old)
BrandASUSASUS
SocketAM4AM4
ChipsetB550B550
Form factorMicro-ATXMicro-ATX
Memory typeDDR4DDR4
RAM slotsnot statednot stated
Maximum RAMnot statednot stated
Fastest RAM speed statednot statednot 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
WiFi (differs)Yes (generation not stated)WiFi 6
Bluetoothnot statednot stated
Wired LAN (differs)1GbEnot stated
USB4 / Thunderboltnot statednot stated
Fastest USB-C portnot statednot stated
SATA portsnot statednot stated
Power phases (as stated by the maker)not statednot stated
BIOS flashbacknot statednot stated
Debug LED / POST code (differs)not statedYes
ARGB headersYesYes
Video outputs (differs)HDMIHDMI, DisplayPort
Audio codecnot statednot stated
Colour (differs)not statedBlack
Amazon sales rank (differs)#86,197#1,431
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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