WD Caviar SE16 500 GB drives scored a 5.9--the highest possible score--on the Windows Experience Index performance tests built into Windows Vista. These drives combine 16 MB cache with 300 MB/s transfer rate for lightning-fast performance and cool, quiet operation. Enhanced reliability features help protect the drive and the data stored on it. Key Features Top performance for Windows Vista - The WD Caviar SE16 500 GB SATA drive received a 5.9, the highest possible score on the Windows Vista Experience Index. 16 MB Cache - Bigger cache means faster performance. A massive 16 MB cache combined with advanced acoustic and power-reducing technologies make these ultra-fast drives the perfect solution for the fully loaded PC. IntelliSeek™ - Calculates optimum seek speeds to lower power consumption, noise and vibration. View demo> Ramp Load - Parks the recording heads off the disk surface during spin up, spin down and when the drive is off.  This ensures the recording head never touches the disk surface resulting in improved long term reliability due to less head wear, and improved non-operational shock tolerance. Preemptive Wear Leveling (PWL) - The drive arm frequently sweeps across the disk to reduce uneven wear on the drive surface. Ideal For Designed for use in the fastest PCs on the market, including high-performance business computers and multimedia or gaming systems. Perfect for Windows Vista. How this WD hard drive protects your data Data Lifeguard™ is an exclusive set of data protection features, including shock protection, an environmental protection system and real-time embedded error detection and repair. WD's Data Lifeguard technology automatically finds, isolates, and repairs problems that may develop over the life of a hard drive. Data Lifeguard Tools™ are software utilities designed for WD hard drives that work with the embedded Data Lifeguard features to make hard drive installation,diagnostics and repair both simple and worry-free. (Download Data Lifeguard Tools) ShockGuard™ instantaneously protects the hard drive against damage from bumps and vibrations while it is running. This technology enables WD Caviar drives to achieve industry-leading shock specifications. Important interface information This drive requires a SATA interface [WD Interface Guide] Up to 142,000 digital photos Up to 125,000 songs (MP3) Up to 12,000 songs (uncompressed CD quality) Up to 38 hours of Digital Video (DV) Up to 200 hours of DVD quality video Up to 60 hours of HD video Mouse over each item to see how it was calculated. (Examples of the number of photos, songs, videos and any other files that can be stored on a hard drive are provided for illustrative purposes only. Your results will vary based on file size and format, settings, features, software and other factors.) One gigabyte (GB) = one billion bytes. One terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment.