Large Assembly/Hardware?

Is there a rule of thumb, regarding when should an assembly should be considered a LARGE assembly. The reason for the question Is that I'm having a lot of issues with the software. Given the hardware I have In the PC, I expected the soft ware to run much better that it is at the present moment.

I'm running 2015 SP 04

Is there a place in this forum to discuss hardware.

SolidworksAssemblies