You are using a mobile platform so my advise on this is rather useless. I use a D20 with a Quadro K4000 and a Tesla C7020 which gives me 9GB RAM plus being able to couple the GPU of the Tesla to the Quadro for rendering processing. SolidCAM is known to bog down non mobile workstations depending on config and RAM available. I am sorry but don't have a lot of info to offer.