-gpow resets to 100% after devfee. 4.1c Windows 10 x64 1607 Nvidia 418.81.

update:

-mi 0 does not decrease intensity low enough (-ethi 0-2 claymore is decreasing enough though).
-li 1 not suitable at all usage jumping from low to 100% all the time.

-mi 0 and -gpow 90 works perfectly but resets to 100% usage after devfee.