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SpecificationMSI PRO B850M-P WIFI MotherboardB850M Challenger WiFi AM5 mATX HDMI/DP
Price (new) (differs)£137.99as of 20 Sep, 02:43£136.11as of 20 Sep, 02:43
Amazon Warehouse offernot statednot stated
RRP (differs)£139.99£311.99
Price badgenot statednot stated
First available on Amazon (differs)Jun 2025 (1 yr 2 mo old)Feb 2026 (6 mo old)
Brand (differs)MSIASRock
SocketAM5AM5
ChipsetB850B850
Form factorMicro-ATXMicro-ATX
Memory typeDDR5DDR5
RAM slots44
Maximum RAMnot statednot stated
Fastest RAM speed stated (differs)8,200 MT/s8,000 MT/s
M.2 slots (differs)3not stated
Newest PCIe generation statedPCIe 5.0PCIe 5.0
PCIe 5.0 graphics slotYesYes
PCIe 5.0 M.2 slotYesYes
WiFiWiFi 7WiFi 7
Bluetooth5.45.4
Wired LAN (differs)5GbE2.5GbE
USB4 / Thunderboltnot statednot stated
Fastest USB-C port (differs)10 Gbpsnot stated
SATA portsnot statednot stated
Power phases (as stated by the maker) (differs)not stated8+1+1
BIOS flashbacknot statednot stated
Debug LED / POST codenot statednot stated
ARGB headersnot statednot stated
Video outputs (differs)not statedHDMI, DisplayPort
Audio codec (differs)not statedALC897
Colournot statednot stated
Amazon sales rank (differs)#1,063#35,139
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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