GUARANTEED TO WORK on ANY motherboards and platforms, unlike controllers on Via chipsets, which freeze tightly on many Socket 775, 2011 v1 boards. Insert the controller into any free PCI-E slot, and you get two USB 3.1 Gen1 ports, guaranteed to work on any operating system, which is the same as classic 3.0. Any Windows, starting from 7, already contains drivers for this controller, and this also applies to the vast majority of Linux and other OSes. Two high-speed modern ports are especially relevant for systems where they do not exist at all, or where there are problems with USB, or where you simply need to expand their available number. Your USB 3.0 flash drives and external drives will get a second wind with this controller. Attention! The controller is powered from a small FDD connector, do not purchase a controller if you do not have one, or an adapter, (or conscious soldering skills!)