I would recommend downloading Omega drivers, replace the official drivers from ATI or NVidia. They are optimized to make games look and play better. I'm using the Omega drivers for ATI, and it comes with ATI Tray Tools, which has FPS options, not to mention temperature and other things that you can display in the corner of the screen. At first, I actually thought FRAPS was running because the numbers looked exactly the same, but I found out that it was the Tools. I don't know if the NVidia drivers have the same. You should still download it if it doesn't.