|As per the link above, you cannot. To get any significant improvement you will need to start from scratch and build or purchase something truly new. GHz alone would only help mildly, a new system properly built would have many more advantages in true speed, even at the same GHz. Look to the 2nd generation i-series Intel processors, DDR3 memory, etc.|
You have to be a little bit crazy to keep you from going insane.