Received the ASUS XONAR_DG PCI 5.1 sound card today to install in my HP p6750f desktop with Windows 7 - 64 bit. Installation went smooth..connected all the cables, etc, and hit Power On. The PC did detect the sound card, but, that is as far it went. Inserted the XONAR_DG driver and utility CD, and that didn't do much. No sound whatsoever. I did uninstall the Realtek ALC662 driver before installing the sound card. Now the Multimedia Audio Controller shows I don't have a driver for that. I've uninstalled the ASUS sound card and driver, and installed the Realtek integrated sound card and driver. Still nothing in way of sound. I have a USB 2.O to3D Audio Sound Card Adapter Virtual 7.1 CH that I can plug in to a USB port with my pin type 2 speakers and get good sound. Other than that, it's down hill. There's surely must be a solution, or I have installed the ASUS XONAR card in the wrong PCI slot. Would like to get a Live Chat lookup with with ASUS, but they are off line. Any ideas would be appreciated.