Motherboards with 4 PCIe x16 Slots

2 motherboards with 4 PCIe x16 Slots from Supermicro and ASRock Rack. Prices run $185 to $189.

ShangzhaoyuanSpec score 8.1

LGA2011-3, E-ATX, DDR4, 256GB

+Dual CPU support for multi-processor workloads

+Supports up to 256GB of RAM

+Four PCIe x16 slots for multiple expansion cards

−Large E-ATX form factor needs a full-size case

−Uses the older LGA2011-3 socket

$184.99

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

MachinistSpec score 8.3

LGA2011-3, E-ATX, DDR4, 256GB

+4 pcie x16 slots: the most pcie x16 slots of the 9 here

−256GB maximum memory: 4 of the 6 here have a higher maximum memory

$189.99

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

Compare specs

motherboard	Socket	Form factor	Memory type	Maximum memory	PCIe x16 slots	Spec score	Price
	LGA2011-3	E-ATX	DDR4	256GB	4	8.1	$184.99 as of 11/04/2026 07:07 PST - Details
	LGA2011-3	E-ATX	DDR4	256GB	4	8.3	$189.99 as of 11/04/2026 00:04 PST - Details

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