I see, i find it weird to begin with that you can actually profile a code like that, for me it doesn't make sense. But then again i don't understand how it even works. Interesting about the march settings, actually searched on thet before. I got an i5, so i guess i should do tat, but with corei5? (i5 760)? EDIT: Oh wait, you had i5 as well, and noticed "corei5" doesn't exist. Won't there be compatibility issues?