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SpecificationASRock B850M Challenger WiFi White Socket AM5 Micro-ATX MotherboardB850M Challenger AM5 mATX HDMI/DP
Price (new) (differs)£136.20as of 13 Oct, 06:22£144.78as of 13 Oct, 06:22
Amazon Warehouse offernot statednot stated
RRP (differs)£255.99not stated
Price badgenot statednot stated
First available on Amazon (differs)Jan 2026 (9 mo old)Feb 2026 (7 mo old)
BrandASRockASRock
SocketAM5AM5
ChipsetB850B850
Form factorMicro-ATXMicro-ATX
Memory typeDDR5DDR5
RAM slots44
Maximum RAMnot statednot stated
Fastest RAM speed stated8,000 MT/s8,000 MT/s
M.2 slotsnot statednot stated
Newest PCIe generation statedPCIe 5.0PCIe 5.0
PCIe 5.0 graphics slotYesYes
PCIe 5.0 M.2 slotYesYes
WiFi (differs)WiFi 7None named in the listing title
Bluetooth (differs)5.4not stated
Wired LAN2.5GbE2.5GbE
USB4 / Thunderboltnot statednot stated
Fastest USB-C port (differs)not stated5 Gbps
SATA ports (differs)not stated4
Power phases (as stated by the maker)8+1+18+1+1
BIOS flashbacknot statednot stated
Debug LED / POST codenot statednot stated
ARGB headersnot statednot stated
Video outputs (differs)not statedHDMI, DisplayPort
Audio codecALC897ALC897
Colour (differs)Whitenot stated
Amazon sales rank#43,623#43,623
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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