VST Performance in Cubase 8 vs 7.5

Has anyone tried looking at their video card? I found this post about cubase 7.5

I have noticed that my audio interface and video card often seem to conflict, when trying to use skype or facetime for instance.

Also, I have recently noticed that, when I automate in Cubase 8 - the graphics do not follow the automation (i.e. knobs don’t turn as written, but the audio automation works)

Perhaps this is a solution? Problem is - I am on an iMac and can’t find a way to modify my graphics card.

I will try.