Adaptec AUA-3121 PCI to USB Enhanced Host Controller: At 400 megabits per second, the FireWire/1394/i.LINK standard is ideal for multi- media input devices such as digital video (DV) camcorders, and high-speed storage devices, scanners, and CD-RW drives. In fact, you can "daisy chain" up to 62 peripherals from the three FireWire ports (2 external and 1 internal)on your DuoConnect card. USB 2.0 combines high-speed performance with the plug-and-play simplicity that has made USB peripherals so popular. USB 2.0 products include external hard drives, CD-RWs, DVD-Rs, and scanners can run at up to 480 Mbps. That's 40 times faster than USB 1.1 peripherals! DuoConnect's four ports (3 external and 1 internal) provide maximum compatibility and connectivity to newest USB 2.0 devices as well as USB 1.1 standard.