Thank you Joe_intel for your answer. I´ve tested these Settings. As I´ve opened the power Settings of the CPU I´ve found the C6/C7 power states disabled. The Setting 12V2 Min-load is not available. I´m still using the only available BIOS 0336. In this way I can´t realise the setting as you´ve descripted. After I´ve saved these settings and start up my System the Intel Desktop Utilitys give an alert to me about a to few core voltage.Also I´d a look on your link. The use the BIOS Version 0341. This version is not downloadable from any Intel Website. Not in Germany or North America. Where I can get it? Perhaps this will the reason I can´t found the 12V2-Setting.
I`m still using a very modern 1000-Watt-PSU. The Silverstone Strider Gold Evolution.