Part numbers are :
we also tried with MLNX_OFED 4.0, but no use
What is the server model and vendor?
Where is the card currently installed (PCI GEN & Width)?
Have you tried a different slot?
Is the BIOS version aligned to the latest version?
Do you see the card at the BIOS menu?
Any errors generated upon power on self test?
Have you review the /var/log/messages for errors?
Do you still need assistance?
I replied to your original inquiry but you did not respond.