The Western Digital WD WD10EZEX 1TB Caviar Blue 3.5 inch Internal Hard Drive SATA 3 is designed for one thing - power. For the serious gamer, or someone otherwise committed to maximum computer performance, this hard drive is designed for you. This product uses modern high-speed SATA connectivity to ensure uninterrupted parallel data transfer between your computer and the disk. The hard drive is powerful and committed to getting the most out of your system. It has a powerful 7200 RPM rate, giving you quick access to your files when you need them immediately, as well as SATA 3 6gb/s transfer rates.