To measure the temperature with the Force cooler, we used the SpeedFan utility, which provided us with real time monitoring and created a graph of temperature over time.

Fan speed with the stock cooler on the NForce4...

Unfortunately, the Force cooler comes with a three pin, two cable fan connector, so we couldn't record its rotation speed. According to the manufacturer, it is 4300 rpm, which is a thousand and even more rpm, lower than the stock cooler.

Temperatures with the stock cooler on board...

and now the Force cooler.

The difference in peak temperature levels was about 4°C lower with the Force installed. The noise level is not noticeable.