Just a heads up; have not seen this mentioned on any forum.
ASUS released an update for AI Suite II so it works now!
Go to your motherboard download page -> Windows 7 64-bit -> Utilities -> AI Suite II Patch file - Version 1.00.00
(Yes, use Windows 7 - it's not listed under Windows 10, at least for the P9X79 Pro)
To get it to work (for me) I had to:
1. Uninstall AI Suite 2. Restart 3. Disable asusfancontrolservice from services.msc 4. Delete folder and contents of "C:\Program Files (x86)\ASUS" 5. Delete registry entry folder "Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\ASUS\AsusFanService" should be 3 entries in this folder 6. Restart 7. Reinstall AI Suite completely (don't disable any parts) 8. Restart 9. Extract the AI Suite Patch folder anywhere, and run "AxIns.exe" 10. Restart
It should work now, including fan xpert.
NOTE: You may not have to do all of the things above. There is no harm in attempting to just run the patch and see if it works. For me, it didnt, so I tried a bunch of methods of reinstalling and this one worked.