Hi jcc12
It sounds like a cool project, regarding the power consumption I don’t know if you have seen this document (https://communities.intel.com/docs/DOC-21892) it is about the safety and regulatory information of the device. If you take a look at page 3, right where it says DC Power are indicated the maximum values of power for the device, as well as the device with a PCIe card and other connections. I recommend you to look for a low consumption card that fulfills your project needs and not exceed those values of power.
Regards
JPMontero_Intel