i overclocked it now to 4.9 with 1.45v and i thought it is not high voltage because there is reviews that overclocked this chip with higher voltage check this :
Ivy Bridge Debuts: Intel Core i7-3770K Review > Overclocking Performance - TechSpot Reviews Intel i7 3770K at 4.9 GHz at 1.45V - Cinebench - YouTube
i dont use this overclock all the day i used it only while playing games like skyrim , prototype 2 , bf 3 multiplayer . i know that you are right about high temp about some programs like cinbench 11.5 and aida 64 the temp was about 82 celisus and this is because the cpu core usage is 100% and all the processors will have high temp but not like ivy bridge . thank you guys for your help.