[CentOS] Which version of Centos 4.2

Fri Feb 24 13:57:26 UTC 2006
Kari Salovaara <kari.salovaara at pp1.inet.fi>


I've Intel® Pentium® D processor 820 in my desktop.
Which version should I install, i386 or x86_64 ?
I understand that i386 works but how is x86_64 ?
If I understand correctly, this processor is also EM64T.
Which are cons and pros ?

Best regards,

Kari Salovaara