5.1Ghz even 5.0Ghz is sweet spot if stable ?

I can do 5.0Ghz stable at 1.45v , but this is high Vcore for 24/7 use (even with decent Temp.), so i down-clock to 4.4Ghz at 1.31 only, and i save much heat and power, and its more than enough for my games and every day use .