8 ASUS Xonar D2X3. Installing the Xonar Hardware3.1 Preparing Your ComputerBefore you proceed with the following installation steps, it’s recommended that youdisable your onboard audio device in your BIOS settings, or uninstall any othersound cards on your PC. (For BIOS setting or uninstallation of other sound cards,refer to the user manuals of your motherboard and sound card)1. Power off your computer and disconnect the power cord.2. Open the computer’s case.3. Remove the metal brackets from one unused PCI Express x1 slot for theaudio card and its adjacent slot for the MIDI board (You can just remove oneif you don’t need to use the MIDI board in the package).3.2 Installing the Audio Processing Card1. Face the bracket of the Xonar D2X audio card toward the back panel of yourcomputer and insert the audio card gently into an available PCI Expressslot. Make sure it’s completely inserted into the PCI Express slot. (Warning!Do not force the audio card into the slot. Make sure that the gold pins ofthe card's PCI Express connector are aligned with the motherboard’s PCIExpress connector before you insert the card into the PCI Express slot. If itdoes not fit properly, gently remove it and try again.)