SYMPTOMS:
Guitar Hero III is playing very poorly on my PC. How can I improve performance?

RESOLUTION:
If the game is experiencing sudden slow-downs, choppiness, or dragging, you may need to adjust graphic settings to increase performance.

1.From the main menu, .select "Options"
2.Select "Graphics".
3.Try any of the following options to increase your performance:
a.Set "Resolution" to a lower value.
b.Set "Graphics Detail" to "LOW".
c.Set "Crowd" to "OFF".
d.Set "Physics" to "OFF".
With all of these settings at the minimum, your game will be running at maximum performance.