Try The Geforce 470.05 Beta Drivers

Hi
I've never done manual driver swaps before.
AND, I have 2 cards running, one LHR and one FHR.
Meaning that I'm going to have to run the driver on both cards, even though only the LHR card actually needs it.
Am I fretting over nothing?
If I try it and it doesn't unlock a significantly better hash rate for my LHR card can't I just go back to the recommended drivers, easy peasy, no problems?
Would love to hear your thoughts. Thank you!