The standard Mac Pro includes one 250GB hard drive. Like the Power Mac G5, the Mac Pro uses SATA hard drives. But while the Power Mac supported SATA drives with a maximum bandwidth of 1.5 gigabits per second (Gbps), the Mac Pro supports the second generation of SATA drives—sometimes known as SATA II or SATA-300—which have a maximum potential bandwidth of 3 Gbps. However, this doesn’ actually translate into doubled speed—drive mechanisms aren’t currently fast enough to pump out that much data in that amount of time.