I bought a AMD / ATI HIS HD 7870 to replace my old HD 4870.
I noticed that the fan speed does not scale with the temperature: The fan speed does not get below 28% (read from catalyst / automatic fan speed)
If I manually change it in the catalyst to 20% then it has the same speed than 28% : about 900-1000 rpm.
With HIS iTurbo i manually can change the fan speed below 20%. But I noticed that changing the fan speed below 16% results in 3200 rpm.
This is really stupid and annoying since my PC is a ultra silent PC and all fans are running with about 500 rpm when the PC is idle (windows / musik movies, etc.)
Is there any way to change the fan speed to a reasonable speed like 500 rpm by software or hardware adapters (I really don't like to put a poti between the 12V line)