Compare 2 motherboards

Side-by-side comparison of 2 motherboards

Specification	ASUS Prime B850M-K AMD Micro-ATX Motherboard	Asrock B850M-X R2.0 Amd B850 Am5 Micro Atx 2 Ddr5 Hdmi Dp 2.5G Lan…
Price (new) (differs)	£96.00as of 18 Oct, 06:23	£104.94as of 18 Oct, 06:22
Amazon Warehouse offer	not stated	not stated
RRP (differs)	not stated	£243.99
Price badge (differs)	not stated	30-day low
First available on Amazon (differs)	Mar 2025 (1 yr 6 mo old)	Jun 2025 (1 yr 4 mo old)
Brand (differs)	ASUS	ASRock
Socket	AM5	AM5
Chipset	B850	B850
Form factor	Micro-ATX	Micro-ATX
Memory type	DDR5	DDR5
RAM slots (differs)	not stated	2
Maximum RAM	not stated	not stated
Fastest RAM speed stated (differs)	not stated	8,200 MT/s
M.2 slots	2	2
Newest PCIe generation stated	PCIe 5.0	PCIe 5.0
PCIe 5.0 graphics slot (differs)	not stated	Yes
PCIe 5.0 M.2 slot (differs)	not stated	Yes
WiFi (differs)	None named in the listing title	WiFi 6E
Bluetooth	not stated	not stated
Wired LAN	2.5GbE	2.5GbE
USB4 / Thunderbolt	not stated	not stated
Fastest USB-C port	5 Gbps	5 Gbps
SATA ports (differs)	not stated	4
Power phases (as stated by the maker) (differs)	8+2+1	6+1+1
BIOS flashback	not stated	not stated
Debug LED / POST code	not stated	not stated
ARGB headers (differs)	Yes	not stated
Video outputs	HDMI, DisplayPort	HDMI, DisplayPort
Audio codec (differs)	not stated	ALC897
Colour	not stated	not stated
Amazon sales rank (differs)	#93,380	#65,813
Buy	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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