Compare 3 motherboards

Side-by-side comparison of 3 motherboards
Specification	MSI PRO B850-S WIFI6E Motherboard	MB ASRock AMD AM5 B850 Pro RS	ASUS PRIME B850-PLUS-CSM
Price (new) (differs)	£152.65as of 5 Nov, 18:22	£150.14as of 5 Nov, 18:20	£161.99as of 5 Nov, 18:20
Amazon Warehouse offer	not stated	not stated	not stated
RRP (differs)	not stated	£363.99	£161.99
Price badge	not stated	not stated	not stated
First available on Amazon (differs)	Sep 2025 (1 yr 1 mo old)	Jan 2025 (1 yr 9 mo old)	Mar 2025 (1 yr 7 mo old)
Brand (differs)	MSI	ASRock	ASUS
Socket	AM5	AM5	AM5
Chipset	B850	B850	B850
Form factor	ATX	ATX	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)	2	not stated	3
Newest PCIe generation stated (differs)	PCIe 5.0	not stated	PCIe 5.0
PCIe 5.0 graphics slot	not stated	not stated	not stated
PCIe 5.0 M.2 slot (differs)	Yes	not stated	not stated
WiFi (differs)	WiFi 6E	None named in the listing title	WiFi 6E
Bluetooth (differs)	5.3	not stated	not stated
Wired LAN (differs)	2.5GbE	not stated	2.5GbE
USB4 / Thunderbolt	not stated	not stated	not stated
Fastest USB-C port (differs)	10 Gbps	not stated	10 Gbps
SATA ports	not stated	not stated	not stated
Power phases (as stated by the maker) (differs)	not stated	not stated	8+2+1
BIOS flashback	not stated	not stated	not stated
Debug LED / POST code	not stated	not stated	not stated
ARGB headers (differs)	not stated	not stated	Yes
Video outputs (differs)	not stated	not stated	HDMI, DisplayPort
Audio codec	not stated	not stated	not stated
Colour	not stated	not stated	not stated
Amazon sales rank (differs)	#220,184	#21,333	#9,626
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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