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Side-by-side comparison of 4 motherboards
SpecificationASUS PRIME B850M-A-CSMB850M Challenger AM5 mATX HDMI/DPASRock B850M Rock WiFi Socket AM5 Micro-ATX MotherboardGIGABYTE B850M Eagle WIFI6E ICE AMD AM5 mATX Motherboard
Price (new) (differs)£144.98as of 5 Nov, 18:22£145.62as of 5 Nov, 18:22£144.04as of 5 Nov, 18:22£148.30as of 5 Nov, 18:20
RRP (differs)£377.99not stated£270.99not stated
First available on Amazon (differs)Apr 2025 (1 yr 7 mo old)Feb 2026 (8 mo old)Jan 2026 (9 mo old)Jun 2025 (1 yr 4 mo old)
Brand (differs)ASUSASRockASRockGigabyte
RAM slots (differs)not stated424
Fastest RAM speed stated (differs)not stated8,000 MT/s8,200 MT/snot stated
M.2 slots (differs)3not stated12
PCIe 5.0 graphics slot (differs)not statedYesYesnot stated
PCIe 5.0 M.2 slot (differs)not statedYesYesnot stated
WiFi (differs)None named in the listing titleNone named in the listing titleWiFi 6EWiFi 6E
Bluetooth (differs)not statednot stated5.3not stated
Fastest USB-C port (differs)5 Gbps5 Gbps5 Gbpsnot stated
SATA ports (differs)not stated44not stated
Power phases (as stated by the maker) (differs)not stated8+1+16+1+18+2+2
BIOS flashback (differs)Yesnot statednot statednot stated
ARGB headers (differs)Yesnot statednot statednot stated
Video outputs (differs)HDMI, DisplayPortHDMI, DisplayPortHDMI, DisplayPortnot stated
Audio codec (differs)not statedALC897not statednot stated
Colour (differs)not statednot statednot statedWhite
Amazon sales rank (differs)#9,626#50,419#50,419#105,007
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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