As far as I know, the game is badly optimized. This means that even if it's run on a powerful machine, it will still run bad.
The minimum system requirements for this game are:
- OS: Microsoft Windows XP, Vista and 7
- Processor: 2.0 GHz Intel or equivalent AMD processor
- Memory: 1 GB RAM
- Graphics: Nvidia Geforce 6800 Series, ATI Radeon X850, S3 Chrome 430 GT or better (min 256 MB VRAM)
- Hard Drive: 1 GB free hard drive space
- Sound: Sound card