Motherboards under $400

3 motherboards under $400 from ASUS, Supermicro, GIGABYTE and more. Prices run $317 to $381.

Supermicro

LGA1700, ITX, DDR5, 2 Memory slots

+Mini-ITX form factor for compact builds

+DDR5 memory support

+ECC memory support for error-correcting RAM

−Only two RAM slots

−Maximum memory capacity of 64 GB

$355.00

as of 11/04/2026 07:10 PST - Details

ASUSSpec score 8.2

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

Generic

LGA2011-3, ITX, DDR4, Intel X99

+Compact Mini-ITX form factor for small builds

+Supports ECC memory

+Includes 64GB of DDR4 memory

−Single-socket layout limits upgrade options compared with larger boards

$381.48

as of 11/04/2026 00:41 PST - Details

Compare specs

Socket	Form factor	Memory type	Chipset	Spec score	Price
LGA1700	ITX	DDR5		n/a	$355.00 as of 11/04/2026 07:10 PST - Details
AM5	ITX	DDR5		8.2	$317.12 as of 11/04/2026 12:10 PST - Details
LGA2011-3	ITX	DDR4	Intel X99	n/a	$381.48 as of 11/04/2026 00:41 PST - Details

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