My new PC's monitor is an Alienware AW2310 that mates an Aurora R-3 and is Stereoscopic 3D with the nVidia glasses, though I did not have the 3D set up as to this thread topic.
If I set the monitor refresh rate at 60 Hertz, in game, I get a steady 60 frame rate.
If I set it at its default setting of 59 Hertz, in game, I get a steady 75 frame rate.
If I set it at 125 Hertz, in game, I get 125 frame rate, do not know, yet, how steady this is.
These refresh rates are some of the modes it can display. Also, I have 29; 30; 100; 110 refesh rates it can display.
The checkbox is checked to "hide modes that this monitor cannot display" .
I got back online last night, after being offline a few days, in game, with my new PC, so I played not very long.
What is the best monitor refresh rate for optimum frame rate performance in game?