Need more USB ports? Upgrade your PC with support for the latest in USB technology with a 4-Port SuperSpeed USB 3.0 PCI Express Adapter Controller Card. SuperSpeed USB 3.0 boasts data transfer rates of up to 5Gbps- more than 10X that of its predecessor. With quick and easy installation, you'll enjoy the lightning fast transfer rates of USB 3.0 devices performing at full speed potential. Backwards compatible with USB 2.0 / 1.1 devices Supports simultaneous operation of multiple USB 3.0 and USB 2.0 devices Supports 4 downstream ports for all speeds Supports Windows 7/8/10/Vista/XP 32/64-bit, Server 2003-2008 32/64-bit Molex power required