Although we don't know for sure yet it's been said 110W for this card which is about same I'd expect about my overclocked 7900GTO perhaps. For 65nm and NVIDIA it sounds about right though. TDP numbers spitted out for 55nm 2950Pro is 104W and XT 135W to make a comparision.
Should also provide good enough headroom for the next gen highend series don't you think if a 110W card could already do this much damage?Die-shrink still seems to be GPU market's best friend...
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