4GB KIT (2 x 2GB) SO-DIMM DDR2 NON-ECC PC2-6400 800MHz For Dell Studio. Designed For Dell Studio: 1435, 15 (1535), 15 (1536), 15 (1537), 15 (1555), 15 (DDR2), 1535, 1536, 1537, 1555 (DDR2), 17 (1737), 17 (DDR2). Will also work with many other brands and models. Additional Details ------------------------------ Package quantity: 1