I have already reinstalled the driver, the errors are definitely related to the relive installation. (Win 7, newest driver)
Whenever I boot up the Computer, I have 17 Error reports in the Systemlog from "sfsync04". All these errors originate from "systemroot\system32\drivers\atikmdag.sys"-
Beside some really annoying Coil Whine the Card (RX 480) itself seem to run without Issues though.