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Side-by-side comparison of 4 motherboards
SpecificationB850M Challenger WiFi AM5 mATX HDMI/DPASRock B850M Challenger WiFi White Socket AM5 Micro-ATX MotherboardMSI PRO B850M-P WIFI MotherboardASRock B850M Rock WiFi Socket AM5 Micro-ATX Motherboard
Price (new) (differs)£136.11as of 20 Sep, 02:43£134.49as of 20 Sep, 02:43£137.99as of 20 Sep, 02:43£132.85as of 20 Sep, 02:43
Amazon Warehouse offernot statednot statednot statednot stated
RRP (differs)£311.99£255.99£139.99£270.99
Price badgenot statednot statednot statednot stated
First available on Amazon (differs)Feb 2026 (6 mo old)Jan 2026 (8 mo old)Jun 2025 (1 yr 2 mo old)Jan 2026 (8 mo old)
Brand (differs)ASRockASRockMSIASRock
SocketAM5AM5AM5AM5
ChipsetB850B850B850B850
Form factorMicro-ATXMicro-ATXMicro-ATXMicro-ATX
Memory typeDDR5DDR5DDR5DDR5
RAM slots (differs)4442
Maximum RAMnot statednot statednot statednot stated
Fastest RAM speed stated (differs)8,000 MT/s8,000 MT/s8,200 MT/s8,200 MT/s
M.2 slots (differs)not statednot stated31
Newest PCIe generation statedPCIe 5.0PCIe 5.0PCIe 5.0PCIe 5.0
PCIe 5.0 graphics slotYesYesYesYes
PCIe 5.0 M.2 slotYesYesYesYes
WiFi (differs)WiFi 7WiFi 7WiFi 7WiFi 6E
Bluetooth (differs)5.45.45.45.3
Wired LAN (differs)2.5GbE2.5GbE5GbE2.5GbE
USB4 / Thunderboltnot statednot statednot statednot stated
Fastest USB-C port (differs)not statednot stated10 Gbps5 Gbps
SATA ports (differs)not statednot statednot stated4
Power phases (as stated by the maker) (differs)8+1+18+1+1not stated6+1+1
BIOS flashbacknot statednot statednot statednot stated
Debug LED / POST codenot statednot statednot statednot stated
ARGB headersnot statednot statednot statednot stated
Video outputs (differs)HDMI, DisplayPortnot statednot statedHDMI, DisplayPort
Audio codec (differs)ALC897ALC897not statednot stated
Colour (differs)not statedWhitenot statednot stated
Amazon sales rank (differs)#35,139#35,139#1,063#35,139
BuyCheck price on AmazonCheck 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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