ASUS Motherboards under $400

4 ASUS motherboards under $400. Prices run $317 to $399.

ASUSSpec score 9.2

AM5, ATX, DDR5, 5 M.2 slots

+Wi-Fi 7: the highest wi-fi of the 6 here

+5 m.2 slots: only 1 of 5 here have more m.2 slots

$399.99-11%List: ~~$449.99~~

as of 11/04/2026 12:10 PST - Details

ASUSSpec score 8.8

AM5, ATX, DDR5, 3 M.2 slots

+Built-in Wi-Fi 7 for current wireless standards

+5G LAN for faster wired networking

+Three M.2 slots for storage expansion

−Fewer M.2 slots than higher-tier ProArt boards

−Limited to the AM5 socket

$317.95

as of 11/04/2026 12:09 PST - Details

ASUSSpec score 9.0

AM5, mATX, DDR5, 4 M.2 slots

+Compact mATX form factor for smaller builds

+AMD B850 chipset for AM5 Ryzen processors

+Four M.2 slots for multiple storage drives

−Fewer expansion options than full ATX boards

$350.77

as of 11/04/2026 12:10 PST - Details

ASUSSpec score 8.5

AM5, ITX, DDR5, 2 M.2 slots

+Mini-ITX form factor fits compact builds

+Built-in Wi-Fi 6E for faster wireless

+2.5G LAN for faster wired networking

−Only two M.2 slots for storage expansion

−Limited to the AM5 socket

$317.12

as of 11/04/2026 12:10 PST - Details

Compare specs

Socket	Form factor	Memory type	M.2 slots	Wired LAN	Spec score	Price
AM5	ATX	DDR5	5	5G	9.2	$399.99 as of 11/04/2026 12:10 PST - Details
AM5	ATX	DDR5	3	5G	8.8	$317.95 as of 11/04/2026 12:09 PST - Details
AM5	mATX	DDR5	4		9.0	$350.77 as of 11/04/2026 12:10 PST - Details
AM5	ITX	DDR5	2	2.5G	8.5	$317.12 as of 11/04/2026 12:10 PST - Details

Spec scores, pros and cons, and prices are explained in the How it works section of the About page.