1 is what it is rated. I've heard it'll go to .8. Mine seems whacky at those levels though. Doing the calculations with ohms law calculator I'm sure it's not putting out what it reads. Even a 1.2 coil set at 11W on my MVP doesn't fire as warm as the
mod for some reason. But I think if I remember correctly the MVP is limited at 3 amps so even if it fires at .8 you aren't getting correct readings. Anything over 1.2 ohms is going to be over that amp limit.