Hello, we have tried the card on another identical server (and identical motherboard) and have the same issue.
Our BIOS version is the same as yours - 2.15.1234 and UEFI version "IMS-180 P1.30" (see *1 photo below). We have also done a BIOS reset ("Load UEFI Defaults") (see *3 photo) and then disabled the "Rapid Start Technology". Our motherboard is connected to the PSU via the ATX12V connector rather than the DC connector at the back (you can see this on our previous photos).
Another difference is your BIOS screen shows that your CPU does not have support for "VT-d" where as ours does (but it is disabled in the bios) - see *2 photo below.
When you issue a reboot (ie 'sudo reboot') from Ubuntu (12.04.4 64bit), does your CPU fan stop for half a second during the reboot? We have found that if we make certain changes in the BIOS (ie PCI Gen Speed), the motherboard will then do a full reset (causing the CPU fan to briefly stop) and then the TBS card is then present. If we do a reboot in Ubuntu, the CPU fan never stops during the reboot and the TBS card is no longer present?
*1)
https://my.pcloud.com/publink/show?code=XZEDsXZkxA8mEKI0LuaT93mAnktF8390bdV*2)
https://my.pcloud.com/publink/show?code=XZADsXZVHhu9cob9G7H7Qai0TzJ4FE2PPiX*3)
https://my.pcloud.com/publink/show?code=XZ3DsXZDRmPG6VcTJFkYu6DUzhRS72uKxzV