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SpecificationB850M Challenger AM5 mATX HDMI/DPMSI PRO B850M-P WiFi Motherboard
Price (new) (differs)£142.23as of 20 Sep, 02:43£143.94 (currently unavailable)as of 20 Sep, 02:43
Amazon Warehouse offernot statednot stated
RRPnot statednot stated
Price badge (differs)not stated90-day low
First available on Amazon (differs)Feb 2026 (6 mo old)May 2025 (1 yr 4 mo old)
Brand (differs)ASRockMSI
SocketAM5AM5
ChipsetB850B850
Form factorMicro-ATXMicro-ATX
Memory typeDDR5DDR5
RAM slots44
Maximum RAMnot statednot stated
Fastest RAM speed stated (differs)8,000 MT/s8,200 MT/s
M.2 slots (differs)not stated3
Newest PCIe generation statedPCIe 5.0PCIe 5.0
PCIe 5.0 graphics slotYesYes
PCIe 5.0 M.2 slotYesYes
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 ports (differs)4not stated
Power phases (as stated by the maker) (differs)8+1+1not stated
BIOS flashbacknot statednot stated
Debug LED / POST codenot statednot stated
ARGB headersnot statednot stated
Video outputs (differs)HDMI, DisplayPortnot stated
Audio codec (differs)ALC897not stated
Colournot statednot stated
Amazon sales rank (differs)#35,139#153,585
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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