This listing is for fourElpida 2GB 1Rx8 PC3-12800S-11-10-B2 RAM memory modules designed for laptops. Each module has a capacity of 2GB, providing a total capacity of 8GB for the set. These DDR2 SO-DIMM modules have a bus speed of Pc3-12800S, making them compatible with many laptops requiring this specific memory technology. The compact SO-DIMM form factor ensures easy installation into laptop memory slots, providing a reliable and efficient upgrade for enhancing the performance of the system.