I know many people ask for suggestions on system requirements.  However I could not find anything specific to my question.

I am about to spec our new systems, we will be installing 2016.  My question is regarding performance of Non-native SW files.  We deal with very large and complex assemblies (truck chassis) that come from the vendors and have to be converted.  Of course I do all the usual's, ask for parasolids, resolve conversion errors etc..  However they still run VERY slowly on our computers.  Is there something specific that can help address this?  I have increased RAM on our current systems and that does help.  However I am wondering if anyone knows if there is somewhere else I should be looking to beef up specs that would help address this specific issue.   Processor, video card, something different?  I am by far not a computer expert and essentially only know to ask for "more", but as we all know budgets usually do not allow for everything on our wishlist.  So I am hoping someone might know of something particular to pay attention to when creating the spec.  Thank you in advance