Myths and truth about 64/32 comparison:

- 64-bit systems aren't faster than 32-bit ones;
- 64-bit systems have ability to address more virtual storage (not physical storage - you can find others ways to do that- see PAE for example)
- some applications can be faster on 64 bit - because of larger virtual storage, large registers, etc
- some 64 bits systems using single virtual storage can be faster than ones using multiple virtual storage due to reduced context switching - that is not the case of intel - still multiple virtual storage.