OCZ DDR2 SO-DIMMs are built to provide optimal levels of compatibility using the highest quality components available. Each module comes backed with industry leading technical support and the OCZ Lifetime Warranty, ensuring complete product satisfaction for unparalleled peace of mind. Specification: 667MHz DDR2, CL 5-5-5-15, 2GB Module, Unbuffered, 1.8 Volts, 200 Pin Dimm