Technically, no matter how good the video card, you're still limited by the refresh rate of your monitor (which in your case is 60hz... or 60fps).
While it IS possible to turn off v-sync to show a higher number, it is generally not a good idea as your video card will now be putting out a 'faster signal' than your monitor can handle, and this can lead to visual artifacts, tearing, and resource issues... and cause no benefits whatsoever (besides bragging rights as to how fast your video card can really go).
It is good to do from time to time for testing purposes, just to make sure everything is on the up and up.
You can disable v-sync from the video options on the first AH login screen (before you login), provided that v-sync is set to 'application controlled' or 'automatic' in your video card settings.