Compare 3 motherboards

Side-by-side comparison of 3 motherboards
Specification	ASUS PRIME B850M-A-CSM	B850M Challenger AM5 mATX HDMI/DP	GIGABYTE 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	£148.30as of 5 Nov, 18:20
Amazon Warehouse offer	not stated	not stated	not stated
RRP (differs)	£377.99	not stated	not stated
Price badge	not stated	not stated	not stated
First available on Amazon (differs)	Apr 2025 (1 yr 7 mo old)	Feb 2026 (8 mo old)	Jun 2025 (1 yr 4 mo old)
Brand (differs)	ASUS	ASRock	Gigabyte
Socket	AM5	AM5	AM5
Chipset	B850	B850	B850
Form factor	Micro-ATX	Micro-ATX	Micro-ATX
Memory type	DDR5	DDR5	DDR5
RAM slots (differs)	not stated	4	4
Maximum RAM	not stated	not stated	not stated
Fastest RAM speed stated (differs)	not stated	8,000 MT/s	not stated
M.2 slots (differs)	3	not stated	2
Newest PCIe generation stated	PCIe 5.0	PCIe 5.0	PCIe 5.0
PCIe 5.0 graphics slot (differs)	not stated	Yes	not stated
PCIe 5.0 M.2 slot (differs)	not stated	Yes	not stated
WiFi (differs)	None named in the listing title	None named in the listing title	WiFi 6E
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 (differs)	not stated	4	not stated
Power phases (as stated by the maker) (differs)	not stated	8+1+1	8+2+2
BIOS flashback (differs)	Yes	not stated	not stated
Debug LED / POST code	not stated	not stated	not stated
ARGB headers (differs)	Yes	not stated	not stated
Video outputs (differs)	HDMI, DisplayPort	HDMI, DisplayPort	not stated
Audio codec (differs)	not stated	ALC897	not stated
Colour (differs)	not stated	not stated	White
Amazon sales rank (differs)	#9,626	#50,419	#105,007
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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