Asus's GL552 meets that criteria, though it is designed for gaming (http
/www.laptopmag.com/reviews/laptops/asus-rog-gl552)
Dell's Inspiron 15 7000 uses AMD graphics, but it's pretty good for the money (http
/www.laptopmag.com/reviews/laptops/dell-inspiron-15-7000)
Obviously, if you want to do CAD work, the best choice is to get a workstation-class laptop with Nvidia Quadro graphics, but you're talking about spending at least $1,500 for something like that. Amongst light-weight workstations, we really like the Dell Precision 5510 (http
/www.laptopmag.com/reviews/laptops/dell-precision-5510)