Some got lucky with 1.25v @ 4.6GHz. They say there's a bell graph where small percent of the best and the bad were released into the market while most the the chips are average performer, for this Haswell and heck for every model. Now don't think that the bad chip is bad but they won't overclock well. Come to think about it, overclocking void the warranty unless you get it covered with http://www.intel.com/go/tuningplan