Download GPU Tweak
- Navigate to Professional Mode
- Set 2D clock to 3D clock value - Click apply
- No more clock fluctuation
Click default to restore regular 2D clocks
Elite Dangerous Supercruise Mode:
Try placing the 15.6 DLL files in the Elite Dangerous folder, this should resolve the issue and allow you to keep using the Crimson drivers in other games. Additionally, you can try installing Catalyst 15.6 driver which does not have the issue.
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Source
I don't have Elite, but in the example below i placed the DLL's in the GTA V directory.