A-Tech 2GB 2 x 1GB PC2-6400 Desktop DDR2 800 MHz DIMM 240-Pin Non-ECC Memory RAM is a set of two memory modules with a total capacity of 2 GB. Each module has a capacity of 1 GB and operates at a frequency of 800 MHz. It is designed for use in desktop computers and is compatible with various brands including Dell, HP-Compaq, Apple, Intel, IBM-Lenovo, Toshiba, Acer, Asus, and Sony. The memory features Non-ECC Unbuffered technology and comes with a lifetime manufacturer warranty.