my pc be a very old one and do not have a pcie slot . this card fit well . installation be a snap and work very well with Windows 7 . I be able to increase my system performance from 2.0 to 3.5 with this card . however , the card 's heatsink be too tall and will collide with a adjacent PCI card . so , either it take up 2 slot or try to install in the far end slot .