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SpecificationASUS PRIME B850M-A-CSMB850M Challenger WiFi AM5 mATX HDMI/DP
Price (new) (differs)£144.98as of 5 Nov, 18:22£148.66as of 5 Nov, 18:22
Amazon Warehouse offernot statednot stated
RRP (differs)£377.99£311.99
Price badgenot statednot stated
First available on Amazon (differs)Apr 2025 (1 yr 7 mo old)Feb 2026 (8 mo old)
Brand (differs)ASUSASRock
SocketAM5AM5
ChipsetB850B850
Form factorMicro-ATXMicro-ATX
Memory typeDDR5DDR5
RAM slots (differs)not stated4
Maximum RAMnot statednot stated
Fastest RAM speed stated (differs)not stated8,000 MT/s
M.2 slots (differs)3not stated
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 LAN2.5GbE2.5GbE
USB4 / Thunderboltnot statednot stated
Fastest USB-C port (differs)5 Gbpsnot stated
SATA portsnot statednot stated
Power phases (as stated by the maker) (differs)not stated8+1+1
BIOS flashback (differs)Yesnot stated
Debug LED / POST codenot statednot stated
ARGB headers (differs)Yesnot stated
Video outputsHDMI, DisplayPortHDMI, DisplayPort
Audio codec (differs)not statedALC897
Colournot statednot stated
Amazon sales rank (differs)#9,626#50,419
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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