Has anyone used the Intel i7 2920 for AutoCad 2012?

I looking into a mobile workstation for running AutoCad 2012, AutoCad Inventor, etc. I have a tendency to run at least 3 applications at once, usually AutoCad; Internet Explorer; and Word. So I was wondering if anyone that is using this processor has had any problems with the lower 2.5 ghz when running AutoCad. I know that desktops are more practical for 3d rendering, design, etc. but I am always on the road and could use a mobile option.