Today's surprise was to find that my most resent purchase of a 345 server with rails came with 2 left side inner rails and no right side inner rail. I have posted the picture here and am contacting the seller. I will give them credit it was wonderfully packed!

The previous system (from a different seller) was also purchased on eBay. As you can see it got busted up good getting here. The seller made prompt restitution and I cannibalized it for spare parts and ordered a replacement.

The my other question is if anyone has any idea what this TCB5C Board is? It came in slot 3 of this system. I am thinking some kind of RAID or communications card.