Situation update 4:

AMD drivers 16.3 added: [QUOTE]Power Efficiency Toggle: A new feature introduced in the Radeon™ Settings Gaming tab for select AMD Radeon™ 300 series and AMD Radeon™ Fury X available under "Global Options". This allows the user to disable some power efficiency optimizations.[/QUOTE] [IMG]http://i.imgur.com/gL8riUg.jpg[/IMG] As specified in drivers changelog this is a toggle [B]supported only in 300 series and Fury X GPUs[/B].It appear and disappear without any effect in other GPUs. The performance unlocking effect in supported GPUs is limited (it doesn't lock clocks) and doesn't work always in all games (3D power state). An universal solution for all AMD GPUs can only be obtained using the reg values specified here: [url]https://www.reddit.com/r/Amd/comments/477ot0/how_to_fix_fury_x_clock_throttling_on_radeon/[/url] First reg value solution is already available in RadeonMod: - 1.0.13 [06/03/2016] [QUOTE]Added Crimson Power Saving to "Tweaks". Toggle off to prevent GPU downclocking.[/QUOTE] [url]http://forums.guru3d.com/showthread.php?t=403389[/url]