Compare 3 motherboards

Side-by-side comparison of 3 motherboards
Specification	ASUS Prime B850M-K Gaming Motherboard Socket AMD AM5	ASUS PRIME B850M-F AMD AM5 Socket DDR5 8200MHz OC Supported mATX…	Asrock B850M-X R2.0 Amd B850 Am5 Micro Atx 2 Ddr5 Hdmi Dp 2.5G Lan…
Price (new) (differs)	£109.99as of 5 Nov, 18:20	£108.99as of 5 Nov, 18:20	£104.94as of 5 Nov, 18:22
Amazon Warehouse offer	not stated	not stated	not stated
RRP (differs)	£199.99	£129.99	£243.99
Price badge (differs)	not stated	not stated	30-day low
First available on Amazon (differs)	Apr 2025 (1 yr 6 mo old)	Jan 2024 (2 yr 10 mo old)	Jun 2025 (1 yr 4 mo old)
Brand (differs)	ASUS	ASUS	ASRock
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	not stated	2
Maximum RAM	not stated	not stated	not stated
Fastest RAM speed stated (differs)	not stated	8,200 MT/s	8,200 MT/s
M.2 slots (differs)	2	not stated	2
Newest PCIe generation stated (differs)	PCIe 5.0	PCIe 4.0	PCIe 5.0
PCIe 5.0 graphics slot (differs)	Yes	not stated	Yes
PCIe 5.0 M.2 slot (differs)	Yes	not stated	Yes
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 (differs)	2.5GbE	not stated	2.5GbE
USB4 / Thunderbolt	not stated	not stated	not stated
Fastest USB-C port (differs)	5 Gbps	not stated	5 Gbps
SATA ports (differs)	not stated	not stated	4
Power phases (as stated by the maker) (differs)	8+2+1	not stated	6+1+1
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)	not stated	HDMI	HDMI, DisplayPort
Audio codec (differs)	not stated	not stated	ALC897
Colour	not stated	not stated	not stated
Amazon sales rank (differs)	#9,626	#36,973	#58,771
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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