I have a Dell Inspiron 1545 with the basic motherboard. I was given the latop for free so I figured why not spend 100 or 200 bucks and make it decent. I have seen the 1545 with ATI discreet graphics cards for sale from 100-300 dollars but is this the only MOBO that will fit? Do I have other options? If I wanted a decent latop I would have to spend over 700 bucks. The PC came with 8 GB of Ram and 1TB hardrive so really the only other thing I would spend money on is processor and GPU.