Thanks for the prior replies and help a few days ago.  My nvOC rig has been running for a few days now and I keep playing with it / etc.  Once I get it all dialed in I am going to move some more 1070s from my Win10 machine and move them over to the dedicated mining rig (nvOC).  Currently the nvOC rig has 3 gtx 1070s and 1 gtx 970.  The fan speed seems to be working on all cards but can anybody tell me if they have gotten GTX 970 cards to overclock?  The cards say they overclock in the startup but the hashrate does not actually increase.  It stays rock solid at 18-18.5 MH/s which is stock speeds for a GTX970.  Any help appreciated.  Thanks