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Side-by-side comparison of 2 motherboards
SpecificationMB ASRock AMD AM5 B850 Pro-A WiFiASUS PRIME B850-PLUS-CSM
Price (new) (differs)£147.92as of 5 Nov, 18:20£161.99as of 5 Nov, 18:20
Amazon Warehouse offernot statednot stated
RRP (differs)£336.99£161.99
Price badgenot statednot stated
First available on Amazon (differs)Jan 2025 (1 yr 9 mo old)Mar 2025 (1 yr 7 mo old)
Brand (differs)ASRockASUS
SocketAM5AM5
ChipsetB850B850
Form factorATXATX
Memory typeDDR5DDR5
RAM slotsnot statednot stated
Maximum RAMnot statednot stated
Fastest RAM speed statednot statednot stated
M.2 slots (differs)not stated3
Newest PCIe generation stated (differs)not statedPCIe 5.0
PCIe 5.0 graphics slotnot statednot stated
PCIe 5.0 M.2 slotnot statednot stated
WiFi (differs)Yes (generation not stated)WiFi 6E
Bluetoothnot statednot stated
Wired LAN (differs)not stated2.5GbE
USB4 / Thunderboltnot statednot stated
Fastest USB-C port (differs)not stated10 Gbps
SATA portsnot statednot stated
Power phases (as stated by the maker) (differs)not stated8+2+1
BIOS flashbacknot statednot stated
Debug LED / POST codenot statednot stated
ARGB headers (differs)not statedYes
Video outputs (differs)not statedHDMI, DisplayPort
Audio codecnot statednot stated
Colournot statednot stated
Amazon sales rank (differs)#31,519#9,626
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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