advanced rendering for AutoCAD
Both are important-- multiply clock speed by # of processors to get an estimate for comparison.
These two machines should be pretty similar in performance. The 8-core may be slightly faster for rendering. The 4 core will likely be faster for everything else.
any more question for large assembly Autocad or Autocad Plant 3d Files How Pc is better?
Video cards can make a big difference when working with large drawings in AutoCAD-- this is not important for rendering in nXt (except for WalkAbout).