2.Secure the audio card bracket to the back of your computer with the screw that you removed. Refer to section 3.1.
3.Connect the power cable of your power supply to the power connector on the Xonar D2X audio card.
The PCI Express high-quality audio card requires additional power from your computer. If the power cable is not connected properly, the audio card will not work at all.
When removing the power cable from the Xonar D2X audio card, make sure to pull outward the 4-pin header first, then unplug it from the power connector as the following pictures show. Do not forcefully remove the header from the power connector; doing so may pull up the power connector from the audio card and cause damage!