Compare 3 motherboards

Side-by-side comparison of 3 motherboards
Specification	MSI MAG B850M Mortar WiFi Motherboard	ASUS ROG Strix B850-G Gaming WiFi AMD AM5 B850 mATX	MB ASUS PRO WS B850M-ACE SE
Price (new) (differs)	£298.35as of 22 Sep, 18:22	£309.73as of 22 Sep, 18:22	£349.99as of 22 Sep, 18:22
Amazon Warehouse offer	not stated	not stated	not stated
RRP (differs)	not stated	not stated	£860.99
Price badge	not stated	not stated	not stated
First available on Amazon (differs)	Jun 2025 (1 yr 3 mo old)	Jul 2025 (1 yr 2 mo old)	Nov 2025 (10 mo old)
Brand (differs)	MSI	ASUS	ASUS
Socket	AM5	AM5	AM5
Chipset	B850	B850	B850
Form factor	Micro-ATX	Micro-ATX	Micro-ATX
Memory type	DDR5	DDR5	DDR5
RAM slots (differs)	4	not stated	not stated
Maximum RAM	not stated	not stated	not stated
Fastest RAM speed stated (differs)	8,200 MT/s	not stated	not stated
M.2 slots (differs)	3	4	2
Newest PCIe generation stated	PCIe 5.0	PCIe 5.0	PCIe 5.0
PCIe 5.0 graphics slot (differs)	Yes	Yes	not stated
PCIe 5.0 M.2 slot	Yes	Yes	Yes
WiFi (differs)	WiFi 7	WiFi 7	None named in the listing title
Bluetooth (differs)	5.4	not stated	not stated
Wired LAN (differs)	5GbE	2.5GbE	2.5GbE
USB4 / Thunderbolt	not stated	not stated	not stated
Fastest USB-C port	20 Gbps	20 Gbps	20 Gbps
SATA ports	not stated	not stated	not stated
Power phases (as stated by the maker) (differs)	not stated	14+2+1	not stated
BIOS flashback (differs)	not stated	Yes	not stated
Debug LED / POST code (differs)	not stated	Yes	not stated
ARGB headers (differs)	not stated	Yes	not stated
Video outputs (differs)	not stated	HDMI, DisplayPort	not stated
Audio codec (differs)	not stated	ALC1220	not stated
Colour	not stated	not stated	not stated
Amazon sales rank (differs)	#117,517	#332,410	#51,546
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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