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Side-by-side comparison of 3 motherboards
SpecificationB850M Challenger WiFi AM5 mATX HDMI/DPMB ASRock AMD AM5 B850M Steel Legend WiFiMSI PRO B850M-P WIFI Motherboard
Price (new) (differs)£148.66as of 5 Nov, 18:22£149.47as of 5 Nov, 18:22£149.99as of 5 Nov, 18:22
Amazon Warehouse offer (differs)not stated£129.03 (Used - Very Good)as of 5 Nov, 18:22£98.00 (Used - Very Good)as of 5 Nov, 18:22
RRP (differs)£311.99£348.99£139.99
Price badgenot statednot statednot stated
First available on Amazon (differs)Feb 2026 (8 mo old)Jan 2025 (1 yr 9 mo old)Jun 2025 (1 yr 4 mo old)
Brand (differs)ASRockASRockMSI
SocketAM5AM5AM5
ChipsetB850B850B850
Form factorMicro-ATXMicro-ATXMicro-ATX
Memory typeDDR5DDR5DDR5
RAM slots (differs)4not stated4
Maximum RAMnot statednot statednot stated
Fastest RAM speed stated (differs)8,000 MT/snot stated8,200 MT/s
M.2 slots (differs)not statednot stated3
Newest PCIe generation stated (differs)PCIe 5.0not statedPCIe 5.0
PCIe 5.0 graphics slot (differs)Yesnot statedYes
PCIe 5.0 M.2 slot (differs)Yesnot statedYes
WiFi (differs)WiFi 7Yes (generation not stated)WiFi 7
Bluetooth (differs)5.4not stated5.4
Wired LAN (differs)2.5GbEnot stated5GbE
USB4 / Thunderboltnot statednot statednot stated
Fastest USB-C port (differs)not statednot stated10 Gbps
SATA portsnot statednot statednot stated
Power phases (as stated by the maker) (differs)8+1+1not statednot stated
BIOS flashbacknot statednot statednot stated
Debug LED / POST codenot statednot statednot stated
ARGB headersnot statednot statednot stated
Video outputs (differs)HDMI, DisplayPortnot statednot stated
Audio codec (differs)ALC897not statednot stated
Colournot statednot statednot stated
Amazon sales rank (differs)#50,419#19,027#1,466
BuyCheck price on AmazonCheck 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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