Small Cooling Fan speed noise

"Small Cooling Fan" speed can be carried out by the internal speed signal measurement can also be measured (external measurement is to measure fan speed speedometer with a special red line through the outside, internal measurements directly into the BIOS can see, you can also software look. "Small Cooling Fan" internal measurement error is relatively larger). Axial fan speed and cooling capacity and not necessarily related to higher "Small Cooling Fan" speed but will result in higher noise, if the amount of wind almost, you can select low speed fan cooling fan when purchasing products in use when will be quieter.