8 Port USB 2.0/FIREWIRE Combo Pci Card Ports - 4 External, 1 Internal USB 2.0; 2 External and 1 Internal IEEE-1394 Transfer Rates - Up to 480Mbits/sec USB; Up to 400Mbits/sec IEEE-1394 Supports - Windows 98/ME/2000/XP/Vista; Mac OS