I recently builded a new computer with an Opteron 170 Dual Core processor. I installed Win XP Pro (32bit version) and notice that the computer behave somewhat differently. Some how i cant use the ping function due to Data Execution Prevention (DEP), and yes i tried to turn DEP off but it doesnt have an option that will allows me to turn it off. Anyway i just want to find out if running win xp 32bit version will perform any different on a 64bit processor? Also could it be that i'm running a server CPU that it is acting different? Thanks. Title edited -- Please, use [TAGS] in your topic's title. Follow new rules --Sonic