As a rule of thumb, if Pascal boosts around 2GHz then you are utilising it properly ;-) And on 1V - nice. You can try to tweak the voltage curve in MSI Afterburner if you wish (CTRL+F) and flatten the voltage after ~2GHz 1V. It all depends on the card of course. Values over 2GHz usually are only good for e-peen measures, and they produce lots of heat increasing the chance of throttling.
I did my homework and adjusted the the voltage curve in Afterburner to get to the desired values. Yeah, again, I'm pretty happy with the results and with the decision to go for it!