Western Digital 750GB WD7500BPKT Black internal hard drive (6.3 cm (2.5 inch), 7200 rpm, 16MB cache, SATA) (Personal Computers)
the plate is very good! Unpack mirrored after with Disk Utility. as opposed to the default built-Hitachi 250GB I noticed: + Less vibration + Faster in the applications (Open Finder / programs, move files, copy, etc.) + Large cache for caching - Margi