i7 4960X overclocking help?

[karlos1995]

i just bought this pc last week with the i7 4960X and a 1080 and the cpu was over clocked to 4.2ghz running perf but loud as hell so i attempted to move the fans off a controller to system fan connectors to try and slow them more to get the sound down and after doing this i got boot failures and made me revert to optimised defaults before it'd boot the bloke i got it from said its tricky with its fans so i put them back to how they were and tried re overclocking but i must be missing something i cant get anywhere near the 4.2ghz without inane stability issues, any over clocking gurus out there able to give some insight to what i might be missing?

my motherboard is a gigabyte GA-x79-UD3 2011