There's a horizontal and vertical refresh rate. What I saw on my old monitor was something like horizontal 45KHz, vertical 75 Hz.
Yours must be 68KHz, 60Hz, or whatever.
Also, your graphics cards don't influence refresh rate of your monitor. They're independent(except when you're using GSync, of course).
It's nothing problematic.
If you actually meant FPS, then it can mean other things, like a CPU bottleneck, or plain bad optimization of the game, or something of that nature.