What is the Fastest laptop hard disk drive?

At the moment it is 7400 rpm but these tend to cause some laptops to over heat. The best hard drive overall is the SSD. A Solid State Drive (SSD) is a hard drive of sorts. I uses a large flash memory bank that has the ability to retain all data and store and run an operating system. These drives have no moving parts which is best for laptops and they also allow for faster data retrieval and booting up. It also has no adverse heat affects.