The LG 34um67 is capable of going up to 75hz with freesync. I have a gtx 660(the monitor was cheap) and I tried overclocking the monitor to 75hz with the nvidia control panel. The monitor turned on but there was no visible difference in smoothness. I used the included HDMI cable. According to Linus 75hz is very different from 60hz. Is it me, my gpu, or the cable that is preventing me from getting the visible difference? Or should I just save up and buy an AMD card and use freesync?
EDIT: using a dp cable, still looks exactly the same as 60fps