any intel (k) model paired with Z87 will give o/c ability. (safe) o/c depends on sufficient coolling which stock cooler cannot provide! and quality psu and the existance of some basic knowledge on the subject! having all these may result on succesful (safe) overclocking! since you are well equiped, try this http://www.tomshardware.co.uk/forum/id-1722630/intel-god-quick-dirty-guide-4ghz-haswell.html
any intel (k) model paired with Z87 will give o/c ability. (safe) o/c depends on sufficient coolling which stock cooler cannot provide! and quality psu and the existance of some basic knowledge on the subject! having all these may result on succesful (safe) overclocking! since you are well equiped, try this http://www.tomshardware.co.uk/forum/id-1722630/intel-god-quick-dirty-guide-4ghz-haswell.html