The interface also affects Performance InterfaceSpeed Serial 115 Kb/s Parallel (ECP/EPP) 3 Mb/s SCSI 5-320 Mb/s ATA 3.3-133 Mb/s USB 1.5 Mb/s FireWire 3.3-33 Mb/s SATA 150 Mb/s Fibre Channel 2 Gb/s