Recently overclocked L5639 from 2.13Ghz to 3Ghz and saw a noticeable difference but not sure how pronounced that is for a i7-3xxx at 3.5Ghz to an i7-8xxx at 5Gh

Recently overclocked L5639 from 2.13Ghz to 3Ghz and saw a noticeable difference but not sure how pronounced that is for a i7-3xxx at 3.5Ghz to an i7-8xxx at 5Ghz There's definitely a difference between the L5639 at 3Ghz and a i7-6700HQ (2.6Ghz base) in my laptop