Use the USB 3.0 PCI Express x1 Card from LaCie to add two USB 3.0 ports to your computer. The card is compatible with Mac and Windows systems with available an PCI Express x1 slot, and is a quick and easy way to start using devices taking advantage of the USB 3.0 standard. USB 3.0 provides transfer rates as fast as 5Gbps, ten times faster than USB 2.0.
When used in Mac OS X this card must be used with LaCie USB 3.0 drives to achieve USB 3.0 transfer speeds; USB 3.0 drives from other manufacturers will run at USB 2.0 speeds. When used in Windows this card will work at USB 3.0 speeds with drives from any manufacturer.