500GB Capacity, 7200RPM, SATA 6.0Gb/s 3.5inch Desktop Hard Drive ntelliSeek: Calculates optimum seek speeds to lower power consumption, noise and vibration. Works for Servers, PC, Mac, RAID, NAS, Surveillance CCTV DVR Bare Drive Single Pack (No Screws, Cable or accessories included) - Friendly Reminder - Please FORMAT HDD on system in order to be detected or shows on OS. Built to Western Digital's awarding winning quality standards, these drives are available in a full range of performance features. The original. These drives are built utilizing the tried and true proven technology of the original award-winning WD Caviar 3.53-inch hard drives for desktop computers. SATA interface. While SATA has become the industry standard interface, WD continues to manufacture desktop drives with a SATA interface for unique or legacy systems. Value. Solid performance. With SATA and PATA interfaces, and cache sizes up to 32 MB, this series of drives offer a full range of performance features. Capacity. Ultra cool and quiet. Keeping the drive cool enhances reliability. WD continues to develop new and innovative ways to keep drives cool while they are operating which helps protect the drive and the data stored on it.