I tested my current PC-Configuration with Futuremark’s 3DMark06 Basic (free limited version, 576 MB), and the results were very, very frustrating…

My current configuration:

• Processor: Intel(R) Pentium(R) 4 3,00GHz
• Memory: 1,0 GB RAM
• Graphics Adapter: ATI Radeon X300 (SE, I suppose)
• Resolution tested: 1280 x 1024

And these are the (very, very frustrating) results:

I am planning to buy a new graphics adapter, and I guess it will be one of the ATI Radeon X1900 series, which have much better results (see the project search site):

• First example: service.futuremark.com/compare?3dm06=280412
  Intel(R) Pentium(R) 4 3,00GHz
  1536 MB RAM
  ATI Radeon X1900 (512 MB)
  3DMark06 Score: 4.495
  Return to Proxycon: 16.602 fps
  Firefly Forest: 17.333 fps
• Second example: service.futuremark.com/compare?3dm06=252195
  Intel(R) Pentium(R) 4 3,00GHz
  1536 MB RAM
  ATI Radeon X1900 (256 MB)
  3DMark06 Score: 3.650
  Return to Proxycon: 11.800 fps
  Firefly Forest: 13.901 fps

At the moment, Alternate has a nice offer for a Sapphire Radeon X1900GT - I guess 199 € is a good price.