I tried installing everything as you described, but It didn´t work. I installed the wireless adapter with intel Hd Graphics, but when I tried to add the Xonar Essence it was not recognized in the device manager in windows. Also, the boot-process failed many times with both the DWA and Asus. Can I fix this problem with Software, because I don´t want to plug in and plug out my PCI-Cards like a hundred times?
I am not completely sure if this is a compatibility issue.
When that card is not recognized in Windows*, is it recognized in BIOS?
Can you share more information about your system configuration?
The Intel® System Identification Utility report would be helpful too.
I had exactly the same problem with my DZ77BH and my new Asus STX II. I saw the ID of the card in the peripherals overview of the BIOS but Windows did not seem to see it at all.
After reading a lot of useless tips and flashing different BIOS versions - without success that is - I tried to change every BIOS setting that I thought could have an effect.
And eventually I found the one setting that made the card appear in Windows. I disabled the "PCIs ASPM Support" and my problem was gone.