I've never actually used Afterburner. I like Rivatuner because it's both good at overclocking/fan control and excellent for tracking temps/cpu/gpu/ram usage and can even put that info onscreen ingame including frames per second like fraps. Did he include that stuff in Afterburner?
Of course it has in game monitoring
, look at the top left hand corner :
Has temp, fan speed and FPS, you can add usage/core/mem also but I don't bother with those (in-game).