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Side-by-side comparison of 3 motherboards
SpecificationASRock B860M Steel Legend WiFi DDR5 PCIe 5.0 Micro-ATX MotherboardASUS Prime B860M-A WiFi-CSM Offers DDR5MAG B860M Mortar WiFi Motherboard
Price (new) (differs)£196.20as of 5 Nov, 18:22£201.00as of 5 Nov, 18:22£209.99as of 5 Nov, 18:23
Amazon Warehouse offernot statednot statednot stated
RRPnot statednot statednot stated
Price badgenot statednot statednot stated
First available on AmazonJan 2025 (1 yr 9 mo old)Jan 2025 (1 yr 9 mo old)Jan 2025 (1 yr 9 mo old)
Brand (differs)ASRockASUSMSI
SocketLGA1851LGA1851LGA1851
ChipsetB860B860B860
Form factorMicro-ATXMicro-ATXMicro-ATX
Memory typeDDR5DDR5DDR5
RAM slots (differs)4not stated4
Maximum RAMnot statednot statednot stated
Fastest RAM speed stated (differs)8,666 MT/snot stated9,200 MT/s
M.2 slots (differs)not stated23
Newest PCIe generation statedPCIe 5.0PCIe 5.0PCIe 5.0
PCIe 5.0 graphics slot (differs)not statednot statedYes
PCIe 5.0 M.2 slot (differs)not statedYesYes
WiFi (differs)Yes (generation not stated)WiFi 6EWiFi 7
Bluetooth (differs)not statednot stated5.4
Wired LAN (differs)not stated2.5GbE5GbE
USB4 / Thunderbolt (differs)Thunderbolt 4not statedThunderbolt 4
Fastest USB-C port (differs)40 Gbpsnot stated40 Gbps
SATA portsnot statednot statednot stated
Power phases (as stated by the maker)not statednot statednot stated
BIOS flashbacknot statednot statednot stated
Debug LED / POST codenot statednot statednot stated
ARGB headersnot statednot statednot stated
Video outputs (differs)HDMI, DisplayPortHDMI, DisplayPortnot stated
Audio codec (differs)ALC1220not statednot stated
Colournot statednot statednot stated
Amazon sales rank (differs)#70,866#242,956#298,497
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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