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Compare 4 motherboards

Side-by-side comparison of 4 motherboards
SpecificationASUS PRIME B850M-A-CSMGIGABYTE B850M Eagle WIFI6E ICE AMD AM5 mATX MotherboardASRock B850M Rock WiFi Socket AM5 Micro-ATX MotherboardB850M Challenger AM5 mATX HDMI/DP
Price (new) (differs)£144.98as of 5 Nov, 18:22£148.30as of 5 Nov, 18:20£144.04as of 5 Nov, 18:22£145.62as of 5 Nov, 18:22
Amazon Warehouse offernot statednot statednot statednot stated
RRP (differs)£377.99not stated£270.99not stated
Price badgenot statednot statednot statednot stated
First available on Amazon (differs)Apr 2025 (1 yr 7 mo old)Jun 2025 (1 yr 4 mo old)Jan 2026 (9 mo old)Feb 2026 (8 mo old)
Brand (differs)ASUSGigabyteASRockASRock
SocketAM5AM5AM5AM5
ChipsetB850B850B850B850
Form factorMicro-ATXMicro-ATXMicro-ATXMicro-ATX
Memory typeDDR5DDR5DDR5DDR5
RAM slots (differs)not stated424
Maximum RAMnot statednot statednot statednot stated
Fastest RAM speed stated (differs)not statednot stated8,200 MT/s8,000 MT/s
M.2 slots (differs)321not stated
Newest PCIe generation statedPCIe 5.0PCIe 5.0PCIe 5.0PCIe 5.0
PCIe 5.0 graphics slot (differs)not statednot statedYesYes
PCIe 5.0 M.2 slot (differs)not statednot statedYesYes
WiFi (differs)None named in the listing titleWiFi 6EWiFi 6ENone named in the listing title
Bluetooth (differs)not statednot stated5.3not stated
Wired LAN2.5GbE2.5GbE2.5GbE2.5GbE
USB4 / Thunderboltnot statednot statednot statednot stated
Fastest USB-C port (differs)5 Gbpsnot stated5 Gbps5 Gbps
SATA ports (differs)not statednot stated44
Power phases (as stated by the maker) (differs)not stated8+2+26+1+18+1+1
BIOS flashback (differs)Yesnot statednot statednot stated
Debug LED / POST codenot statednot statednot statednot stated
ARGB headers (differs)Yesnot statednot statednot stated
Video outputs (differs)HDMI, DisplayPortnot statedHDMI, DisplayPortHDMI, DisplayPort
Audio codec (differs)not statednot statednot statedALC897
Colour (differs)not statedWhitenot statednot stated
Amazon sales rank (differs)#9,626#105,007#50,419#50,419
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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