- Edited
I played a bit more with MSI afterburner this weekend. After installing a counter-strike game, the MSI afterburner starts to work once I launch the game. It shows that my nvidia graphics card can render 75 frames per second (FPS) which matches the refresh rate of my BenQ monitor (75hz) under 1024 X 768 resolution. If I minimize the game window and let it run in the background, FPS drops down to 45-50. If I exit the game, then MSI burner can not pick up the performance of graphic card and shows 0 FPS. It seems that the graphics card does not render frames at a constant rate despite the fact that the refresh rate of a monitor is fixed at a constant. Launching the game somehow makes the graphics card work more effectively. I tried to actually play the game for a few minutes, did not feel uncomfortable.
I also tried the same thing on the integrated intel card (after disabling the nvidia card), almost instant headaches. MSI burner cannot pick up any FPS in the game. Intel graphics card is definitely one of the headache causes if it is not the only cause.