we already find out that this seems possible no longer an OK setting 
Often was mentioned that “Stutters” can also simple come from wrong monitor sync … In special lots of users not know what is the “lowest” gsync frequency of its monitor. Not many have a range 30 - xxx , more rare is below 30fps… and in special REAL 4K G-Sync monitors are not what most of users bought ( which monitor model you own ? ).
PS.: I never recommend to use these nvidia geforce optimze “thing”…