Toshibas MKxx 76GSX Series 5, 400 RPM hard disk drives build upon the maturity of the Toshiba 320GB per-platter architecture to offer the same big storage capacities with enhanced quality & reliability. Key Features 5400rpm spin speed Eco-conscious & durable design MTTF of 600, 000 hours Five models in the MKxx 76GSX family deliver capacities spanning 160 to 640GB in the compact 2.5-inch form factor. Durable, power efficient, & reliable the MKxx 76GSX drive series is ideal for notebook, all-in-one & Energy Star PCs, printers, gaming consoles, video surveillance systems, external storage devices & other computing applications. Massive storage capacities as well as quieter & cooler operation make the MKxx 76GSX line an attractive, space-saving alternative to desktop hard drives. Power consumption can be reduced by more than 80% with the MKxx 76GSX over like-capacity 3.5-inch hard disk drives. The MKxx 76GSX broadens Toshiba&8217;s line-up of environmentally-sound storage solutions by decreasing or eliminating the use of certain toxic, hazardous or controversial chemicals & materials in the drive.