With the Intel Core i7-920 processor running at the stock 2.66GHz the TRUE Spirit lowered the cpu temperature down to 45 degrees Celsius, which a very good performance for a $40 cooler:

With the system overclocked to 3.5GHz it is still doing very well. Intel's stock cooler gave us around 90 degrees Celsius, while the Cogage True Spirit gave a fair enough 62 degrees C result. As you can see in the chart below, the Scythe Mugen 2 gave the same performance. However, the Mugen 2 required a more complicated installation procedure:

Let's take some sound measurements now. Intel's stock produces the lowest noise among all the tested cpu coolers we have in our labs, at just 37dB. The Cogage True Spirit produces around 48dB at full speed (RPM), an average performance compared to the rest of the coolers appearing in the chart below. We remind you that the PWM function could make the cooler run slower and more quietly.

The Cogage True Spirit is appropriately priced at around $40: