The SK Hynix 2GB 1Rx8 PC3-12800U 11-12-A1 HMT325U6EFR8C-PB memory modules are DDR3 SDRAM UDIMM modules with a total capacity of 2GB. This product is designed to have a standard item height and a bus speed of PC3-12800U (DDR3-1600). With four modules included in the package, each module has a capacity of 2GB and 240 pins for compatibility with various computer systems. Made in Korea, South, these memory modules are reliable and efficient for enhancing the performance of your computer system.