Dual DVI montior

Two questions:
1)
I am running a dual monitor setup 1920x1200 and 1680x1050 at 60 hertz 32 bit color for both. Is this a lot of for a 6800? 8800 GTX? I am running the latter and I am noticing my temperature increasing 5 degrees celsius.

2)
When running a game fullscreen, is the GPU still trying to draw the second monitor thus consuming fillrate? I had a task manager window opened on the 2nd screen and it seemed to be updating which is why I am asking.
 
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