Motherboards under $500

4 motherboards under $500 from ASUS, Supermicro and GIGABYTE. Prices run $410 to $446.

Generic

AM4, mATX, 4 Memory slots, AMD B550

+Micro-ATX form factor fits smaller cases

+AMD B550 chipset with AM4 socket for Ryzen processors

+Four DDR4 memory slots for larger memory configurations

−Micro-ATX layout offers fewer expansion slots than ATX

$446.16

as of 11/03/2026 23:07 PST - Details

Generic

AM4, mATX, 2 Memory slots, AMD A520

+Micro-ATX form factor for compact builds

+AM4 socket supports 5600G, 5700X3D and 5800X3D processors

+Two DDR4 memory slots

−Only two memory slots limits total RAM expansion

$419.90

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

Generic

AM5, mATX, DDR5, AMD B650

+Micro-ATX form factor for compact builds

+AM5 socket supports current AMD Ryzen processors

+Supports DDR5 memory

$409.64

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

Supermicro

LGA1700, mATX

+Micro-ATX form factor for compact builds

+LGA 1700 socket for Intel processors

$419.00

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

Compare specs

Socket	Form factor	Memory type	Chipset	Spec score	Price
AM4	mATX		AMD B550	n/a	$446.16 as of 11/03/2026 23:07 PST - Details
AM4	mATX		AMD A520	n/a	$419.90 as of 11/04/2026 00:41 PST - Details
AM5	mATX	DDR5	AMD B650	n/a	$409.64 as of 11/04/2026 00:41 PST - Details
LGA1700	mATX			n/a	$419.00 as of 11/04/2026 07:10 PST - Details

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