you are probably referring to a driver downloaded from the OpenFabrics project.
I am not 100% sure about your question but asking if you mind trying the latest Mellanox buid for the same operating system.
try it... let us know...
Please notice that under WinOF 5.1 driver and also ofed_3_2_win7x64 under the headers are located under
: libibmad , libibumad