The Blue bead is the starting speed of the fan (minimum 10%) v temperature that you want it to sart at. (Minimum 10C)
The yellow bead sets the upper fan speed (100%) and the temperature that you want the full speed to be activated. This will go up to 100C but DO NOT set it at this as your Maximum CPU temp (if you are running a Phenom ii) is only 62C.
You might decide that you want full speed from the fan when you reach 55C so you need to drag the yellow bead so that the CPU Fan Speed is set to 100% and the CPU Temp is 55C. The red line indicates the way that the CPU fan's speed will increase as temperatures rise.
Sorry for resurrecting but I have the same board and a Phenom X6 1055T 125W. I use a Noctua NH-C14 cooler, and I think it is good enough.
I read on AMD's forums that the maximum temperature of 62° refers to the dimensionless core-"tempereature", not the sensor somewhere on the CPU. When I run Prime95 the core tempereature can hit about 57° at most, while the reading used by Easytune6 is above 65°C at that point. Even in games, 65°C are exceeded, while the core-temp is at 46°, maximum. My problem is that Easytune6 seems to enable 100% speed at 66°C no matter what I set in fan control. Is there a workaround? Even if the slope says it should be lower at 66°C, it jumps to 100% from 30% before for example.
I'd love to use an aftermarket fan controller, but if you know one witch automatically starts the fans at full speed and then reduces them to the specified low RPM, I'd like to know it too please. I haven't found one but my fans won't reliably start at low voltage, and the CPU fan header has this function too for example.