DIMM Mechanical Information

This page compares the mechanical outline for various DIMMs and may help you select the best memory form factor for your application.

Form-factor	Technology	Dimension (nominal)
		Width	Height
DIMM	DDR1	133.35mm	30.48mm
	DDR2	133.35mm	30.0mm
	DDR3	133.35mm	30.0mm
VLPDIMM	DDR1	133.35mm	18.29mm
	DDR2	133.35mm	18.29mm
	DDR3	133.35mm	18.29mm
ULPDIMM	DDR1	133.35mm	18.00mm
	DDR2	133.35mm	18.00mm
	DDR3	133.35mm	18.00mm
SODIMM                SO-RDIMM     SO-CDIMM	DDR1	67.6mm	30.15mm
	DDR2	67.6mm	30.15mm
	DDR3	67.6mm	30.15mm
VLP SODIMM    VLP SO RDIMM VLP SO-CDIMM	DDR1	67.6mm	18.29mm
	DDR2	67.6mm	18.29mm
	DDR3	67.6mm	18.29mm
Micro-DIMM	DDR1	42.5mm	25.0mm
	DDR2	54.0mm	30.0mm
	DDR3	54.0mm	30.0mm
Mini-DIMM	DDR1	82.0mm	30.0mm
	DDR2	82.0mm	30.0mm
	DDR3	82.0mm	30.0mm
VLP Mini-DIMM	DDR1	82.0mm	18.29mm
	DDR2	82.0mm	18.29mm
	DDR3	82.0mm	18.29mm
FBDIMM	DDR1	(n/a)	(n/a)
	DDR2	133.35mm	30.0mm
	DDR3	133.35mm	30.0mm

RAMpedia is a DRAM memory encyclopedia and reference tool
to help computer hardware board designers with DRAM memory subsystems.
This information is provided as a courtesy by Virtium Technology.
www.virtium.com