Thanks for making this thread tsm. I've been pulling my hair out after switching to an SSD and doing a clean windows install. I couldn't figure out why I couldn't change the clocks with MSI Afterburner like I had previously. Found this thread and saw that I was missing the AMD clock control files.
Now all is good and OC'd again.
Someone needs to make this a sticky as the other is a bit out dated. Plus this thread has more options for OC'ing.