There are lots of Geekbench threads with some people boasting about how high there scores are, what do they really mean? For example, there are a few people who have more then doubled their scores by upgrading their CPU's, does that really mean their system is now twice as fast? I can believe that a stock 2.6 Mac Pro 1,1 (2 x dual core CPU's)which normally scores around 5000 is half as fast as a stock 2.8 Mac Pro 3,1 (2 x quad core CPU's) which can score close to twice that. But if that Mac Pro 1,1 gets upgraded to the fastest quad core CPU's it can take, it can score around the same or slightly higher even then the stock Mac Pro 3,1. However there are things about the Mac Pro 1,1 that should hold its performance back, such as a slightly slower bus and slightly slower RAM, not to mention less on CPU cache. I'm just trying to understand that the real world performance is relative to these scores. Obviously upgrading CPU's in a machine will increase the performance, but how much? Thoughts?