Yeah auto. I've since set a custom profile that limits it to 60% fans until about 75C, at which point it goes up steeply. Playing BF3 got me to 78C at between 60-65% fans with my overclock. I think If I tried to overclock to 1200/1500 (what volts are you at btw?) then my card would melt.
EDIT: Interesting note, left my pc for an hour to watch TV, when my monitors go to sleep my clocks drop to the base 300/150, and my idle temp was 33C while everything was shut down.
I got to 77'C on BF3 with fans spinning to 65-70%, so similar, though when my 3 screens hibernated it only dropped to 52'C minimum (not sure of the clocks - think 500MHz). Whatever the issue is it seems fairly consistent.
cj
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