A SO-DIMM, or small outline dual in-line memory module, is a type of computer memory integrated circuit. SO-DIMMs are a smaller alternative to a DIMM, being roughly half the size of regular DIMMs. As a result SO-DIMMs are mainly used in notebooks, small footprint PCs (such as those with a Mini-ITX motherboard), high-end upgradable office printers, and networking hardware like routers. SO-DIMMs are more or less equal in power and voltage rating to DIMM SO-DIMM. DDR have 200 pins. Supports 64-bit data transfer