The Millennium G550 PCIe graphics card brings the reliability, stability, and features of the proven Millennium G550 product line to PCI Express systems. The x1 design of the card makes it compatible with all compliant PCI Express slots - especially useful for systems with no available PCI Express x16 slots. In addition to having Matrox display drivers for Windows, the Millennium G550 PCIe is the world's first PCI Express graphics card with open-source display drivers for Linux and other Unix-like operating systems.