32 Bit or 64 Bit?

I am building a knew comp.and am going to install XP. Pro. CPU will be AMD 64 3700+ 939 Socket. My question is what difference is there between 32 Bit or 64 Bit? Will I still be able to use all the same programs,will I need special drivers? Is there anything that I can't do with 64bit that I am doing now with 32 bit? TIA.

 

The diffrence is 64 bit understands bigger numbers (twice as large as 32bit computers). Which is important to programmers but to the end user it doesn't make a huge diffrence. As far as your concerned you can do everything you could before.

64bit supports everything 32 bit does of course due to some programming reasons you'll require 64 bit drivers IF you use a 64 bit OS. Many of the larger companies already produce 64 bit drivers but not all. Of course if you're worried about it just install the old 32 bit version of windows and everything will work EXACTLY like it does on a 32 bit machine and you don't need to even worry about finding 64bit drivers.