The new PCI Express x1 interface, which will eventually replace PCI, effectively quadruples the amount of available computing bandwidth, resulting in faster music downloads, smoother streaming video and lightning-fast access to mass-storage devices. Syba's PCI-e USB 2.0 controller card gives you five, count'em FIVE ports, bringing you full plug and play connectibility with USB 2.0 and 1.1, and full simultaneous uses with no degradation of control, supporting up to 127 devices per port at a blazing 480Mbps! Stay connected, stay calm, and keep it all in perfect running order with PCI-e! Type: PCI Express to USB Card External USB Ports: 4x USB Ports Internal USB Ports: 1x USB Port Standard: USB 2.0 Data Transfer Rate: 480/12/1.5 Mbps Operating Systems Supported: Microsoft Windows 98SE/ME/2000/XP/2003 Server/XP 64-bit Compatibility: Supports up to 127 devices per port Specifications: NEC 720101 Chipset 1-Lane (x1) PCI-Express with transfer rate 2.5Gb/s full duplex channel 5x Ports Adaptor includes 4x External + 1x Internal Ports (shared with first external port) USB 2.0 EHCI and USB 1.1 OHCI compliant Compliant with PCI-Express Revision 1.0a Backward compatible with USB 1.1 devices Over current protection, each port 500mA Simultaneous operation of multiple high-performance devices Fully plug & play and hot swapping supported