How to Check FPS in COD4
- 1). Start the game and play normally.
- 2). Press the tilda key -- "~" -- while playing to open the game's command console. This key is located above the "Tab" key, on the upper left side of the keyboard.
- 3). Type "cg_drawFPS 1" into the console and press "Enter" to show the average FPS and the current FPS. The figures will stay on the display until you enter the command "cg_drawFPS 0."
Source...