In most of the cases performance problems are caused by outdated or incompatible graphics drivers. We strongly recommend that you download and install the latest graphics drivers (including OpenGL support! ) for your video adapter. You find some links for graphic drivers here.

Furthermore consider the System Requirements.

Please note that the thriXXX software requires at least 64MB of video memory to run. If your card is below this specification you might still be able to play the game, however your video quality and speed will suffer!