Intel i5 6600k overclock to 4.2

[Aryanprince]

I never done any overclock before but I want to just do this modarete with my CPU. In BIOS I have some factory profiles for overclock and there are 4,2; 4,3 ... until 4.6. I set it to 4.2Ghz and it works just fine. I don't see temperature difference from stock. After Firestrike test max temp was 48c. (And from 7800 physics score stock i got 9000 after overclocking to 4.2). But I didn't set any core voltage and left it auto. It goes up to max 1.25 and rarely (i never seen it but hwmonitor showed as max 1.27). Should I leave it like that or i need to set manual vcore? And what would you suggest for my vcore to set in order to work at 4.2Ghz (i know it may be different for every cpu).

Gigabyte z170 Gaming K3
Arctic Freezer i11 cooling

 

[True Buie]

Well i'ts perfectly safe as it is, although you could (probably) bring down the Vcore. Personally I run my i5-4690k @ 4.2Ghz at 1.1v, but again every chip is different, but you should try bringing down the Vcore just a bit.