You can only overclock on a z170 with an early bios. With this you can overclock by the base clock. got the nephews i5 6500 up to 4.5ghz doing this
Highest I took on my 2700k was 1.7 on water but that was for benching. Sat at 5.2ghz and 1.5v for two years with no sign of degradation.
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