So, all up and running finally. Seems with the latest drivers I'm getting much lower benchmark performance...
Left 15.300.1025.0 - Right 15.201.1151.1004
Physics score is me lowering my overclock from 4.875Ghz to 4.750Ghz.
Seems GPU 1 is being utilized 100% and the other 2 are sitting at 50-60%. Frame rate control is off, but seems to stick to around 60+- that's fine for me as my screen is only 60hz but not preferable.
Anyone getting desired performance?