Mushkin Silverline 991756 2GB Desktop RAM is a high performance upgrade for your Laptop. It features a memory capacity of 2GB and is specially engineered to operate at the optimum frequency for compatibility with your system. It is also programmed to use timings that offer maximum compatibility with your system and original memory. Upgrade your PC system with this high performance. This 200-pin SODIMM module is used to provide DDR SDRAM memory for laptop computers and to use DDR SDRAM memory, your motherboard must support DDR. A DDR SODIMM will not fit in the SDRAM SODIMM sockets of older laptops. Mushkin 991756 DDR2 UDIMM 2GB PC2-5300 5-5-5-15 STILETTO 1.