HP QT597AV internal solid state drive 120 GB 2.5" Serial ATA

Solid State Drives have no moving parts so their data access times can be up to 100X faster than hard drives. This is the primary reason that SSDs are nearly always faster than hard drives. Other features of SSDs are very low power consumption, silent drive operation, and superior shock and vibration resistance. For a given capacity SSDs cost noticeably more than hard drives.