Noob Alert!!!

IS the volt mod necessary at all? I just want to get to somewhere between 3.6-3.8 with a 6850 for 24/7 use. The board is in the mail for me, but the bummer is that I leave for 4 weeks of vacation next week and won't be able to play around with it at all . I figured I could ask a couple questions in the meantime though. . . . .