StarTech.com 3 Port PCI High Speed USB 2.0 Adapter Card (PCI220USB) Easily add three USB 2. 0 ports to your desktop computer Offers high speed data transfer rates of up to 480 Mbits/sec. Hot swap capabilities allow you to connect and disconnect devices without turning off your computer PC and Mac compatible 40 times faster than USB 1. 1 Easy plug and play installation Connect up to 127 devices by cascading multiple hubs Backward compatible with USB version 1. 1