Refresh rates do NOT affect FPS.
FPS = Frames per Second = How many distinct images a GPU outputs, per second
Refresh Rate = Number of times a screen is capable of DISPLAYING, per second
Hence, if you have a 60Hz moniter, and are outputting 120 FPS, you only actually display 60 frames. Likewise, if you have a 120Hz moniter and 75 FPS, you will output 75 unique frames.
Refresh Rate DOES affect Vsync however, as Vsync caps the maximum number of frames to the moniters refresh rate, so enabling Vsync on a 120Hz moniter would cap FPS at 120 FPS instead of the normal 60.
OK thank you.