As mentioned before we dropped the daggerhashimoto for 3gb cards because there were a lot of issues/crashes with it among NHM users (especially on primary cards). We could remove the 3gb condition in excavator though, and you can run it without NHM then..
Ok, then I could use it for external mining ?
What do you mean by external mining? You could mine to NH pool just not by using NHM. I'll keep you updated on this.