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If you want one for speed and power, then I'd go for the new Athlon 64bit processors. However, to get full preformance out of it you will need to have a 64 bit OS. I think Windows has one, bug I'm not sure if its out yet for xp.

With the 64bit you'll be able to do twice the work.
I know that a 64 bit processor requires a 64 bit OS. But... does that mean that any software that is going to be used has to support 64 bit? Or... can you use 32 bit software on a 64 bit system, without the performance gain?

It would make sense to me that the software has to be written to support the 64 bit....

Or is that not true... becaus it is 32x86 or 64x86... so as long as its written for x86, you can use it?

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