Well, for one thing, you can get your system to actually use lots of memory. But if you are among those with 2 gigas or less: should you even bother?

At bit-tech, they have sort of revised 64 bit computational history, among personal computers and those of other kinds. The conditions the various operating systems offer are also examined, as they are a key condition for the programs to even work in 64 bit. They point out the lack of programs and drivers as one of the main reasons why we are still living on a 32 bit Windows world.

You probably know that a 32-bits OS only "sees" four gigas of memory, wich end up being reduced to some 3,2 GB (in the case of Windows XP Service Pack 2) because you have to  share it, spend some overhead with virtual memory and devices... you name it. But let's say you just don't care about using more RAM. What else do the 64 bits hold for you? Theoretically, a computer that "speaks" with words of 64 bits can process double the infromation per cycle. In practice, the best I have seen doesn't exceed a 75% performance increase (which isn't quite bad).

Hopefully, you will some day put to good use that Athlon 64 of yours, before it starts gathering dust. 

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