DDR2 DT* 2GB 240 Pin DDR2-667 PC2-5300 Non-ECC Unbuffered 667MHz*Cas Latency 5;Dual Rank (2Rx8); *Made from the highest quality components, Arch Memory RAM modules are designed to increase productivity and help your computer work faster. Arch Memory products are engineered to meet industry standard specifications and rigorously tested to ensure quality. Backed by free technical support, a lifetime replacement **and legendary reliability, Arch Memory RAM is your best choice for upgrading your computers memory.