ok so firstly i have the amd athlon x4 750k.there are 2 feautures in my bios.one called "core performance boost" which is set in auto and one called "turbo core performance boost" which is disabled.my cpu while in full load goes at 3.7ghz cuz of the core performance boost . but in the box of the cpu it says max turbo 4.0ghz...if i enable the turbo performance boost will my cpu go to 4.0ghz in full load?will it give me better performance if i do it ?