If you're on a Mac, you can find the exact processor model number by opening Terminal.app and entering

  sysctl -n machdep.cpu.brand_string

this will return something like

  Intel(R) Core(TM) i7-4650U CPU @ 1.70GHz

(Found on http://osxdaily.com/2011/07/15/get-cpu-info-via-command-line... )