Great for CCTV systems, NAS PC and Mac systems. The Western Digital Blue 500GB Internal HDD from the SATA 600 series, model number WD5000AAKX, is designed and manufactured with the proven performance found in WD's original desktop computers and mobile hard drive accessories. Built to high standards of quality and reliability, these 500GB drives offer features and space that are ideal for your everyday computing needs. These drives are a great way to upgrade your PC or build a powerful machine from scratch.nThe Western Digital Blue Caviar 500GB 3.5-inch internal hard disk offers fast and efficient data processing for desktop computer systems. The WD Blue Caviar WD5000AAKX has a 16MB buffer cache and spindle speeds of up to 7200 RPM. Through its SATA 6 Gb/s interface, it provides data transfer rates of 3 Gb/s from the buffer to the host and 128 MB/s to and from the drive. The Western Digital Blue 500GB HDD comes with several other features that improve its performance. These include t.