I finally figured this one out ....
I have a C6100 with 4 nodes and have the dual port daughter cards installed. When I purchased the server I ran through each node and updated the firmware to 2.10.720 from the 2.7... well one node was missed and that was my issue.
Microsoft base drivers dated from 2013 would show the cards online but RDMA capable, via PowerShell, was false. This immediately prompted me to check the firmware version as I initially had to update the firmware for RDMA to work.
consider this one closed.