Upgraded 1 of 8 rigs with 7x RX470 4GB to 10.2 Beta. Results in picture linked below. Hash rate lower by 2-3% and heat up (which I assume means power consumption up). Seems to be a net negative over 9.7 for me.

Had to up virtual memory to 30GB and had to set -h 832 (default of 900 would crash cards).

https://i.imgur.com/pP3bJ7y.png