windows xp 64 bits vs. windows xp 32 bit

which windows xp is better for games and home application ?

I would say the 32-bit is your best bet just now. I would wait until 64-bit has its bugs worked out and there are more 64-bit drivers. Windows XP x86-64 cannot use 32bit drivers.

Check out www.overclockers.com - Ed had a front page article about XP-64 not that long ago.