Pacha, my previous Q6600 had a VID of 1.325. To run it stable at 3.4Ghz (8x425) i needed 1.41v real for cpu and 1.56v real for NB. For 3.5Ghz i needed 1.51v real for cpu and 1.6v real for NB. I also had to increase FSB VTT some but dont remember how much exactly. My new Q6600 has a vid of 1.30. I need 1.39v real for cpu and 1.37v real for NB to run at 3.6GHZ (9x400).