I "overclocked" my 60hz monitor to 75. I went to nvidia control panel, made a custom resolution, didnt change anything except for the refresh rate, ran the test and it worked so I selected it and now I can run my games in 75hz. The problem is that it runs like crap. Looks more like 30fps but I have v sync turned on and it says I'm getting 75fps. I played gta story mode to compare 60 and 75 since it's a pretty low requirement game and 60 runs way smoother. Do I need to change more settings? I'm using an old flatscreen tv 1080p hdmi. My GPU is msi gtx 1060 6gb so I think it should be able to do above 60hz through the hdmi.