Coug,
The motherboard monitoring software reports the fan speed. The fan has a one-wire connector for the CPU fan header so that the BIOS can read its speed. The speed fluctuated between 1,654-rpm and 1,671-rpm. The case temperature did not exceed 27-degrees Celsius (panels attached) and the CPU temperature did not exceed 55-degrees Celsius. The ambient air temperature outside the case fluctuated between 10 and 15-degrees Celsius. The case also has a 80-mm exhaust fan at the rear running at about 3,500-rpm.
The CPU fan noise was relatively quiet and seemed to match the reported speed.
Jan,
The sensor is installed as described and photographically outlined by Thermaltake - on the underside of the CPU; adhered with a small piece of thermal tape. The fan speed controller is not connected.
I need to get the product into a wamer environment so that I can do some better analysis. Thanks for your input Jan and Coug.
PS: Please keep in mind that the above temperature data was recorded while the CPU was under full load and had maintained this load for a minimum of 8 hours.