http://www.nvidia.com/docs/IO/43395/BD-05238-001_v02_M2050_boardspec.pdf
225W isn't the board power in that case, it's the "Board Power Dissipation" according to that document.
I was confused since people first place a GPU in that chart and later on start to specify which model of card they want in there to have to most desirable specifications. Like Cypress is now split in Radeon and Firestream, but GF100 only as a specific Tesla part.
Maybe I can help you out on both accounts:
Board Power Dissipation it is now, because the amount of energy to get the fan spinning [around 10 percent of total in this case] is removed from the equation for a passively cooled solution. So it's all dissipation now.
Second: In case you're referring to my post, which I assume you do even without you saying so, just read more carefully: The topic was of computing solutions over at RWT, I explicitly referred to supercomputing solutions in my post and the thermals given & linked could only mean one single piece of hardware. I'll remember to spell it out for you next time.