I've never used Afterburner with SLI before.

I'm running 275.33 drivers and even if I go into settings and unlock voltage control & monitoring, I still can't bump voltage? What gives?

One other question. How safe is it to voltage bump these cards? I know a lot of people complained about them dying. BTW, I'm running two MSI GTX 570 Twin Frozr III cards.

Without a voltage bump, I can't really go past 810 or so core clock w/o instability.