AMD/ATi HD4850/4870 Fan Fix!

[eleeter]

If we follow Ohm's law, the power consumption of the card will not change depending on temperature, assuming a consistent load.

Or to rephrase it slightly, the resistance of a graphics card stays nearly the same regardless of heat, which must mean the same power draw.

The way I understand it is, when powered on initially, the card absorbs the energy first. When it reaches it's static output/cooling point, the heat is then transferred to the surroundings. If you increase the fan speed, it means the heat is more quickly transferred to the surroundings on start up, and of course this is maintained, and the cards terminal temperature is lower. But the total heat output does not change, in fact it cannot change because it must obey Ohm's law.

But then again, I have quite a bit of electronic experience, but I am no thermal expert so I could be wrong. But to me, because the electrical energy is being turning nearly 100% into heat, it makes sense.