You didn't Post whether your computer was a Laptop or Desktop.
According to Black Zion, Overdrive doesn't work on a laptop since a Laptop is not meant to be Over or Underclocked due to heat and power issues. overdrive not detecting
This is the last Windows 8.1 APU driver for your Laptop/Desktop. The APU driver includes the drivers for both the iGPU and dGPU. APU.
Here is how to properly install the APU driver on a Laptop: Laptop graphics update...How to .
FYI: Windows 8/8.1 is no longer supported by AMD. So there will be no more Updates to any of AMD GPU cards concerning Windows 8/8.1.