Search the NG. That has been asked and answered numerous times.

(Almost as often as "Why does my 4GB RAM only show up as 3.1?")

"tcukran" <tcukran.331fa3@no-mx.forums.net> wrote in message
news:tcukran.331fa3@no-mx.forums.net...
>
> Hi ,
>
> About 7 months ago I bought a Toshiba notebook (A100-599) and there is
> 32bit vista home premium comes with it. But after a while I got bored
> and installed xp maybe it's because everyone was saying things like
> vista is not ready yet...
> The thing I wonder is should I stick with the 32bit home premium or go
> buy a 64 bit ? I actually don't know if my laptop can run 64bit but it
> says that core2duo processors can do it.
> If someone can help me out of this I'll be really glad .
>
> PS : I'm a normal home user, I don't really use programs that can push
> the processor too hard but still I use photoshop and play games
> sometimes. Is there an important performance difference between 32bit
> and 64bit ?
>
>
> --
> tcukran