Each model boasts a 5400RPM drive and 8MB data buffer, not to mention an operating temperature up to 131 degrees Fahrenheit. Like its predecessor, the MK**52GSX models deliver industry-leading performance to dramatically increase system responsiveness. Plus, the MK**52GSX Series HDDs are quiet & cool in their operation, making them suitable for commercial & consumer notebook PCs, plus a plethora of other devices. The Toshiba MK**51GSX Series HDDs retail between $40 to $120, depending on the model & retail outlet chosen.