On Fri, 24 Feb 2006, Kari Salovaara wrote: > 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 ? if your processor is EM64T then install the x86_64 version. there are no cons. You will experience performance increases. You performance increases will vary depending on what you are doing. If you are just a desktop user then you may not really be able to quantify any gains, but if you are running a very busy server doing alot of IO then you will benefit greatly.