Hi Hassan,
Please note that for ConnectX-3 or older adapter cards the only supported roce version is : RoCEv1.
For your refernce please see the following : Mellanox Adapters - Comparison Table
Latest WinOf driver 5.5 supports Connectx-3 on Windows 2016 with firmware version 2.42.5000 and above:
http://www.mellanox.com/related-docs/prod_software/WinOF_VPI_Release_Notes_5.50.pdf
Thank you,
Karen.