Compare 2 motherboards

Side-by-side comparison of 2 motherboards

Specification	ASUS Prime B850M-K Gaming Motherboard Socket AMD AM5	MB ASRock AMD AM5 B850M Pro-A
Price (new) (differs)	£118.99as of 20 Sep, 06:21	£112.16as of 20 Sep, 06:22
Amazon Warehouse offer	not stated	not stated
RRP (differs)	£199.99	£260.99
Price badge	not stated	not stated
First available on Amazon (differs)	Apr 2025 (1 yr 5 mo old)	Jan 2025 (1 yr 8 mo old)
Brand (differs)	ASUS	ASRock
Socket	AM5	AM5
Chipset	B850	B850
Form factor	Micro-ATX	Micro-ATX
Memory type	DDR5	DDR5
RAM slots	not stated	not stated
Maximum RAM	not stated	not stated
Fastest RAM speed stated	not stated	not stated
M.2 slots (differs)	2	not stated
Newest PCIe generation stated (differs)	PCIe 5.0	not stated
PCIe 5.0 graphics slot (differs)	Yes	not stated
PCIe 5.0 M.2 slot (differs)	Yes	not stated
WiFi	None named in the listing title	None named in the listing title
Bluetooth	not stated	not stated
Wired LAN (differs)	2.5GbE	not stated
USB4 / Thunderbolt	not stated	not stated
Fastest USB-C port (differs)	5 Gbps	not stated
SATA ports	not stated	not stated
Power phases (as stated by the maker) (differs)	8+2+1	not stated
BIOS flashback (differs)	Yes	not stated
Debug LED / POST code	not stated	not stated
ARGB headers (differs)	Yes	not stated
Video outputs	not stated	not stated
Audio codec	not stated	not stated
Colour	not stated	not stated
Amazon sales rank (differs)	#14,479	#55,246
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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