6600k safe voltage

NaXos Gaming

Commendable
Jan 7, 2017
111
0
1,710
hi guys/girls
i been overclocking my 6600k and i was vondering what is the safe voltage?
i was able to get to 4.7ghz at 1.47 volts and that might be to high? im getting temps in the upper 60 like 66-69c cinebench r15 (i upload a pic later bcoz its not important right now)
right now im at 4.6 ghz and 1.4 volts (raised it to 1.41 bcoz bios siad i needed 1.408 volts
and it fine im crushing userbenchmark in all categories just not workstation were i only get 80%
and it all happens at 59-63c

and btw i had it a 4.8 and 1,4 something about a year ago if im right (watched salasar studio overclocking guide) i remember getting 99% persentile in userbench but now im only at 88%?

rewatch the vid
can it be a mainboard thing? is the asus z170 sabertooth mark s a good overclocker?
 

NaXos Gaming

Commendable
Jan 7, 2017
111
0
1,710


ok it was running at 3.9ghz (stock) at 1.3V ?
and now im at 1.4V and 4.6ghz