We stock DDR2 laptop RAM in many different sizes for older laptop models that use this memory. DDR2 SODIMMs have 200pins and typically run speeds of PC2-5300, PC2-6400, or similar. DDR2 Laptop Memory can be used to upgrade the RAM on your DDR2 capable notebook computer. DDR2 SODIMMs come in various sizes ranging commonly from 2GB to 4GB per stick. The most common DDR2 memory speed is PC2-6400, also known as DDR2-800 laptop RAM.