At this time, I would actually expect maybe up to another 10% at most over the current line of Sky Lake in some scenarios, do you feel skylake is a huge leap over what you have already if the answer is no... I'd go ahead and overclock and wait for another upgrade to come, unless you have a lot of interest in the features dx12 has including the cpu in some processing... which apparently isnt supported by ivy bridge as we all seem to have.