VisionTek Products VisionTek 4 Port PCIe USB 3.0 Interface Expansion Card for PCS and Macs (900729) Adds four SuperSpeed USB 3.0 ports each with up to 5Gb/s (600MB/s) data rate - up to 10x faster than USB 2.0 Power USB devices or charge them without needing an AC adapter... each port provides 900mA of power USB 2.0/1.1 backward compatible... works with legacy USB devices Hot swap capable; you can add/detach devices without rebooting Compatible with UASP (USB Attached SCSI Protocol) enclosures for faster data rates and a reduction in required processor resources Adds four Super Speed USB 3.0 ports each with up to 5Gb/s (600MB/s) data rate - up to 10x faster than USB 2.0. Power USB devices or charge them without needing an AC adapter... each port provides 900mA of power. USB 2.0/1.1 backward compatible... works with legacy USB devices. Plug and Play with Macs... no drivers to install. Compatible with UASP (USB Attached SCSI Protocol) enclosures for faster data rates and a reduction in required processor resources.