floydfan

a xeon is for servers, core 2 duo is for desktops... some xeons come in s775 flavor which means they are aimed at workstations more than servers, but most xeons come in s771 form, which is the server platform for intel's low end and mid range server markets and can come in dual or quad socket configuration. other than that they're the exact same chip, except they go through different binning processes, the xeons being tougher. theres no performance difference.