ATI 4850 Fan Speed Control

If I change the fan speed on the video card using the manual fan control on the catalyst manager will it fluctuate when the card gets really hot. What I mean is that when it is on default there is an automatic fan speed that will fluctuate the fan depending on how hot it gets. Will this happens if I manually change the fan speed or will it stay on the percentage that I set?
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More about 4850 speed control
  1. If you manually set the fan speed it will not fluctuate. Why do you want to manually change this? Are you overclocking? I've used ATI Tray Tools in the past to change my fan profile. This way you can increase the fan speed at certain temps to keep it cool yet quiet when not gaming.
  2. My idle temps seem way too high at 77C.
  3. Do you have enough case airflow? Idle they should not be that high. What model 4850 do you have?
  4. I have about 8 120mm fans blowing. The video card is the reference design with single slot cooling. The fan speed at idle is only at 14-16%.
  5. Thanks strangestranger that actually makes me feel a lot better.
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