computer specs to handle large multibodied parts

i wanted to reach out and get a base of what type of systems people are running on large cutlist( large multibody) models any where between 300-1500 solid bodies.

currently running solid workds 2012 sp1

system specs  intel xeon processor es503, 12 gb ram. windows 7 64bit. in a dell precision t5500

SolidworksWeldments