How much is the max. TDP for this card, nowhere can find.

[GeorgeHungary]

http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1157&pid=1463&lid=1
In would like to calculate before I buy the PS.

 

[Aeronautics]

http://www.hwcompare.com/12351/geforce-gtx-680-vs-radeon-hd-7970/