You can enable the smart fan control. I adjust all the rest of the settings to the lowest possible number, then slowly increase them one by one until you can hear the cpu fan. I set the start temp at around 40 celcius. I have a total of 4 fans in my case counting the 2 on the power supply, and I can barely hear any noise. I use a zalman fan mate rpm adjuster for the rear case fan. The cpu fan will respond to the above settings if it is a 4 pin design. 3 pin designs won't slow down and require the rpm adjuster.
Sounds like I have a similar setup, but the only thing I can change is the SMART enable/disable. My CPU fan only turns at 1225 RPM. I want to speed it up. Here are my values:
*SMART control: Enabled (that's the only one that's not grayed out)
*SMART fan start PWM value: 28
*SMART fan start Offset (-): 30. (I know that's the adjustment from the temp sensor under the CPU, because the CPU has no internal sensor. So the offset is just a good guess at what the real temp is.)
*CPU Delta T: Plus 3 (I know what delta n is mathematically, but don't know what it refers to here)
*Fan1 slope PWM va1/1 unit: 5 (???got me by the ass. I'm sure PWM is pulse width modulation, which I've worked with in machinery)
Again, these are all grayed out. I can change nothing but the SMART on and off.
My BIOS is AMI R01-A3, April 2009.
I just stumbled onto this thread while searching, anybody still hanging out around here? Hope so, I could use some ideas.