Markus It's directly active. I think it is specific to Broadwell. I can't get it to go higher or lower no matter what driver version I look at. I haven't tried yet to see if drivers for the later generation GPUs will install.
It's interesting to me how the base it wishes to install (or comes with) is 18.104.22.16831 for Broadwell GT3 (HD 6000), but if you tell it to look in the device manager it will find 22.214.171.12424 and install it, but it won't force install that version, only if you ask it to. Picture looks different. In fact, every version of the drivers I have tried all look different, I think that is ridiculous. What could they possibly be doing that there are differences?
When I say differences, I am talking about subjective picture "stability" whether the backlight seems to have a slight shimmer or not (some have varying intensities of this). Whether colours are more saturated or not, etc. I can absolutely see that with some the colours seem a little more muted while with others (e.g. red and yellow) are boosted, etc. We're not talking large differences, but they are there. Even one landscape scene wallpaper I sometimes throw up for testing, I look for how the picture is rendered, and whether it appears to be crawling (frc effect), some versions have more or less of it.
I might try other branches for fun to see if they can be installed and if so, if the wddm changes. It's the newest wddms that allow for gpu offloading of processes. I don't mind screwing around with drivers (or even OS builds within reason), because 2004 is not my daily driver.