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How can I improve overall system performance?

I have a Compaq Presario SR1950NX desktop computer.

  • AMD64 3800+ processor
  • 1GB ram

It seems that Ubuntu, Xubuntu and Lubuntu are all laggy. Things are slow, such as:

  • clicking on menus
  • opening programs
  • The UI renders in pieces
  • When using the browser the system slows down considerably

I ran the top command and I do notice that xorg hits 30% to 40% CPU when running the browsers.

I have tried these distros on a spare P4 machine and it is even worse. As long as I don't have a several things open at one time I can manage to get around although sluggishly.

Can anyone tell me what is it that I might be doing wrong? I have an integrated Nvidia card and have tried several of the recommended drivers which sometimes result in no boot screen upon reboot.



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