maybe Riva tuner since it is what Afterburner is based on.
I have never actually used the onscreen for more then a few min(just wanted to see the stats).
I use GPU-Z to make charts of starts for video cards, but that is about it
This was a test of the latest Nvidia beta driver in media center. Its good(less card clock up and downs while watching video) http://imageshack.us/a/img211/3241/nvidiamediacenter.png
GPU-Z just gives data, you have to import it to make a chart.