I have experienced the same issue. The chipset software download appears to be nothing more than the "install manager" that it installs. Sad!
Maybe try to install DDU and remove all AMD reg entries, try to install the driver again. Hope this helps.
Comment edited to preserve sanity.
15.7.1 that I downloaded worked perfectly.
Same, report it to AMD so they can fix it.
If you check the directory it unpacks everything into you can manually install if you know what build or even device that needs it. Not sure about RAID, haven't done hardware RAID in years.