Can't set custom resolution

Discussion created by milacich on Mar 3, 2019

I can't set my custom resolution to 1213x1080, I can only set it to 1216x1080, and also, I can feel that it's not smooth like on 1920x1080 because I can't set it to 75hz. It feels really sluggish, while on 1920x1080 it's really smooth because it's 75hz by default. I tried almost everything. Please help