One GPU not detected in Ubuntu

I am a researcher working in HPC. We have a machine with 4 Nvidia TITAN Xp GPU cards. But the system recognizes only 3 of them. How to debug which card is problematic and how to go about debugging the issue? After reading the forum someone suggested to run Here is the generated file. Can someone please help me with this?
nvidia-bug-report.log.gz (1010.8 KB)

The fourth gpu is completely invisible in system config so you should check if the card is properly powered and working at all (in another system).