yes, about 16TB of RAM. modern 32bit CPU's can only adress 64gigs, older CPU's than Pentium Pro can only adress 4gigs, u need a special server OS to adress 64gigs though... windows does not support it as far as I know.
I don't have a 64bit, but I could. I chose not to. And I don't know about anyone else, but I didn't get my great home PC stuff because I'm some kind of pansy-a$s "privileged" guy. I worked my fk'n @ss off for the stuff. Not many people can just randomly throw $2000, $3000, $5000 at a hobby.