Add 2 Ports IEEE P1394b/FireWire 800 in addition to 1Port 1394a at Low Profile PCI card to Transmit and Receive Data at 800/ 400/ 200/ 100 Mbits/s to your System Provides Two Fully Backward Compatible, Bilingual P1394b 9-Pin Ports at up to 800 Megabits per second One 1394a regular 6-Pin Port On Board Power Connector to supply power up to 1.5 amps per Port 32 bit / 33Mhz PCI Built-in 800Mbps driver support from Mac OS 10.2.4 or newer Built-in 400Mbps driver support from Mac OS 8.6 - 10.2.3 FEATURES: PCI Compliant with PCI Specification, revision 2.2 32 bit/33MHz fully compliant PCI host interface Integrated PCI DMA engine Support 5V and 3.3V both IEEE 1394 ( FireWire 800 /400 /200 /100 ) On Board Power connector to have Extra power input from power supply Supports data transfer rate up to 800 Mbps Fully supports Provisions of IEEE P1394b Revision 1.33+ Fully Supports Provisions of IEEE 1394a-2000 and 1394-1995 Standard One External 1394a-2000 Fully Compliant Cable Port at S400, S200, S100 speed Two External Bilingual (9-pin) Cable Ports at S800 or S400b speed Supports Plug and Play