Instructions
Launch FRAPS, then click on the application's "FPS" heading.
Check the boxes next to the elements you'd like FRAPS to log. "FPS" logs the frames displayed per second, the "Frametimes" option recording the length each frame is displayed. The "Minmaxavg" logs averages of the FPS and Frametimes values.
Click on the "Change" button. Select a folder location to store your FRAPSLOG, using the file explorer window that appears.
Click on FRAPS' "Minimize" button, denote by the "_" icon, and then start your game. Press your keyboard's "F11" key when you're ready to start logging your FRAPS benchmarks. Press "F11" a second time to stop logging the FRAPS data.
Close your game, then open the "FRAPSLOG" file from the folder you specified earlier.