Compare 3 motherboards

Side-by-side comparison of 3 motherboards
Specification	ASUS PRIME B840M-A CSM AMD B840 mATX motherboard	ASUS PRIME B840M-A WIFI AMD B840 mATX motherboard	GIGABYTE B840M DS3H Motherboard
Price (new) (differs)	£134.99as of 20 Sep, 06:21	£109.99as of 20 Sep, 06:21	£108.85as of 20 Sep, 06:22
Amazon Warehouse offer	not stated	not stated	not stated
RRP (differs)	£173.21	£193.79	not stated
Price badge (differs)	30-day low	not stated	not stated
First available on Amazon (differs)	Jan 2025 (1 yr 8 mo old)	Jan 2025 (1 yr 8 mo old)	Feb 2025 (1 yr 7 mo old)
Brand (differs)	ASUS	ASUS	Gigabyte
Socket	AM5	AM5	AM5
Chipset	B840	B840	B840
Form factor	Micro-ATX	Micro-ATX	Micro-ATX
Memory type	DDR5	DDR5	DDR5
RAM slots (differs)	not stated	not stated	4
Maximum RAM	not stated	not stated	not stated
Fastest RAM speed stated (differs)	not stated	not stated	8,200 MT/s
M.2 slots (differs)	3	3	2
Newest PCIe generation stated	PCIe 4.0	PCIe 4.0	PCIe 4.0
PCIe 5.0 graphics slot	not stated	not stated	not stated
PCIe 5.0 M.2 slot	not stated	not stated	not stated
WiFi (differs)	None named in the listing title	WiFi 6E	None named in the listing title
Bluetooth	not stated	not stated	not stated
Wired LAN	2.5GbE	2.5GbE	2.5GbE
USB4 / Thunderbolt	not stated	not stated	not stated
Fastest USB-C port (differs)	5 Gbps	5 Gbps	not stated
SATA ports	not stated	not stated	not stated
Power phases (as stated by the maker) (differs)	not stated	not stated	8+2+2
BIOS flashback (differs)	Yes	Yes	not stated
Debug LED / POST code (differs)	Yes	Yes	not stated
ARGB headers (differs)	Yes	Yes	not stated
Video outputs (differs)	HDMI, DisplayPort	HDMI, DisplayPort	not stated
Audio codec	not stated	not stated	not stated
Colour	not stated	not stated	not stated
Amazon sales rank (differs)	#110,665	#30,096	#151,800
Buy	Check price on Amazon	Check price on Amazon	Check 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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