go into catalyst control centre and find vsync, set to off. To be honest, having your gpu output more frames than your monitor can display is pointless. 60fps should be completely smooth with vsync on. If your pc has trouble maintaining 60fps and dips below, try installing Optifine mod, it boosts fps significantly.

Why can't I get more than 60 FPS in Minecraft?

In Minecraft go to Options -> Video settings to make sure that VSync is "Off" and that Max Framerate is "Unlimited". Check that the game is set to max performance mode in the settings. This is usually a problem on Windows 8. Windows is trying to make room for other programs.

Why am I capped at 60fps?

If you notice that your FPS are capped at 60, VSync is most likely set to double or triple buffered. Please try to turn VSync off to unlock your FPS. If you notice that your FPS are unstable and that your game is stuttering (also in Bot matches), VSync is most likely set to double buffered.