At what level is Radeon X1600 mobility compared to nVidia graphic cards?

Answer 1

A Geforce 7600Go would probably be the closest match but it outperforms the X1600. A more comparable option to the 7600 series is the X1650 from ATi but even then, the 7600 series still manages to outperform it. This being a laptop, I'd take the X1600 as you don't have as wide a choice as you do with desktops.