The Hitachi GST Deskstar is a 1 TB internal hard drive with a spindle speed of 7200 RPM. This Hitachi GST Deskstar has a 32 MB cache size. It has a maximum data transfer rate of 228 MBps. The internal hard drive utilizes Advanced Format, which increases the sector size from 512 bytes to 4096 bytes. This feature helps to increase the total overall capacity of the Hitachi 1 TB hard drive while improving error correcting capabilities. It also provides up to 16 percent power savings over previous Hitachi hard drive models. This allows it to deliver better power management and thermal emissions. The connectivity for this Hitachi 1 TB hard drive is available via a seven-pin SATA 6 Gbps interface, and works with machines that support a 3.5-inch form factor. The Hitachi 1 TB hard drive weighs approximately 15.8 oz and measures 4.02 inches wide by 5.79 inches deep by 1.02 inches thick.