I have a Gigabyte z87-d3hp and a 4670k i have overclocked my 4670k to 4.2GHz and i started at 1.2v kept lowering it to 1.198 v,1.196 v ,1.194 v ,1.192 v , 1.190 v , 1.188 v , then i went down to 1.186 v and i got a blue screen so i rebooted it to the bios and changed it to 1.187 v and it runs stable at that does it seem to high for 4.2 GHz 100% load it runs at 62/c and idles at 34/c does everything seem ok? and when i would lower the voltage i would run intel burn test and it said stable and when i got to 1.187 v i ran prime 95 for 8.5 hours and no problems and it topped out @ 80/c