Insisting on what nadebula.1984 wrote: you may get a better experience with
Intel's integrated graphics, i.e., without the nVidia card, hence a gain in
energy consumption too.
My laptop has a Kaby Lake processor, the generation after Skylake. Sadly,
the firmware blob for Kaby Lake is significantly larger than the one for
Skylake. I do not use it, of course, because I value my freedom. I use
Trisquel 8's default kernel... and I am glad with the graphical performances:
I daily play 1080p videos without any problem, I can play at that same
resolution SuperTuxKart (the version in Trisquel 8's repository) at ~18 FPS,
etc.
Intel's firmware is supposed to help three three specific features (but
without freedom 1, we cannot know if that is really all it does):
https://01.org/linuxgraphics/downloads/firmware