Got some bad news guys.  I was reorganizing one of my Titans which has been running non stop for about 5 days when I noticed that the PCI-e socket on one of the cubes is already starting to burn:

I am using dual Seasonic 1250W PSUs for each Titan which have pretty high quality cables.  I didn't start seeing any signs of burned sockets on my Neptunes until around the 2 month mark so I am getting concerned about these Titans.