Brand New 4GB DDR2 800MHz PC2-6400 240 pin Desktop Memory DUAL CHANNEL KIT (2 x 2GB) Pls note: Pic is for illustration only. Actual Product look & brand may vary. !!! Type: 240-Pin DDR2 DIMM Capacity: 4GB (2 x 2GB)Speed: DDR2 800 MHz (PC2 6400)Unbuffered Non-ECC Memory Packaging: Safely packaged in Anti-Static Bags 4GB kit consisting of (2) 2GB DDR2 Desktop Memory modules that operates at speeds up to 800MHz. These are Unbuffered and non-ECC. This kit is compatible with various models of Dell, HP, Sony, IBM, Gateway, Emachines, Lenovo, Acer etc for those use DDR2 PC2-6400 memory. They are also backward compatible to 667MHz PC2-5300.