So I got an H81 BTC PRO board, currently 2x 1060s, 480, 2x 470.  Can only use 4 GPUs at a time, Win7 sees all, but 1 will be inactive.  Does the 6 gpu mod for Win7 work with Polaris cards?  I can switch the 1060s with more 470s if I need to.

Also, is undervolting supported on Linux currently?  This is a huge feature since I can save ~150w+ for the rig going from 1150mv to ~960-1000mv, and get better boost clocks.  Is EthOS easy to use CDM?