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SpecificationASUS PRIME B850M-A-CSMMSI PRO B850M-P WiFi Motherboard
Price (new) (differs)£144.98as of 20 Sep, 06:22£143.94as of 20 Sep, 06:22
Amazon Warehouse offernot statednot stated
RRP (differs)£377.99not stated
Price badge (differs)not stated90-day low
First available on Amazon (differs)Apr 2025 (1 yr 5 mo old)May 2025 (1 yr 4 mo old)
Brand (differs)ASUSMSI
SocketAM5AM5
ChipsetB850B850
Form factorMicro-ATXMicro-ATX
Memory typeDDR5DDR5
RAM slots (differs)not stated4
Maximum RAMnot statednot stated
Fastest RAM speed stated (differs)not stated8,200 MT/s
M.2 slots33
Newest PCIe generation statedPCIe 5.0PCIe 5.0
PCIe 5.0 graphics slot (differs)not statedYes
PCIe 5.0 M.2 slot (differs)not statedYes
WiFi (differs)None named in the listing titleWiFi 7
Bluetooth (differs)not stated5.4
Wired LAN (differs)2.5GbE5GbE
USB4 / Thunderboltnot statednot stated
Fastest USB-C port (differs)5 Gbps10 Gbps
SATA portsnot statednot stated
Power phases (as stated by the maker)not statednot stated
BIOS flashback (differs)Yesnot stated
Debug LED / POST codenot statednot stated
ARGB headers (differs)Yesnot stated
Video outputs (differs)HDMI, DisplayPortnot stated
Audio codecnot statednot stated
Colournot statednot stated
Amazon sales rank (differs)#13,264#153,588
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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