U global stavi adaptive, u igre max performance.
Optimal Power
Maximum power saving. It effectively stops the GPU from rendering anything in idle if the desktop isn't changing. Moving your cursor around for instance will trigger a render. Other than that, it's the same as Adaptive.
Adaptive
Lowers the clock of the GPU and memory when idle and in games (when usage is low). It's basically the same as Intel's Speedstep and AMD's Cool'n'Quiet.
Maximum Performance
Clocks will not be lowered when in games, this will of course increase power consumption and heat. It will lower in idle, however if you launch Google Chrome for instance, the GPU will run at maximum clocks while it's open