For performance testing, our Apple Macbook Core 2 Duo (2GHz) notebook was used. It is stock, save for upgraded memory (2 sticks of Kingston 2GB DDR2 @ 667, 4GB total) and an upgraded hard drive (to a Samsung HM160JI, 160GB 5400RPM hard drive). Temperatures were measured using the CoreDuoTemp application, and full CPU load was simulated using the CPUTest application (running 32 instances). CPU fan speeds were to 6200rpm using smcFanControl to ensure that internal fan speeds would be constant.
The results show that the Notebook Cooler S does make a difference. At idle speeds, the CPU temperature was 1 degree C less with either fan setting compared to without the cooler. At full load, the CPU temperature was 2 degrees C less with the cooler set on Low compared to without the cooler, and 4 degrees C less with the cooler on High. While the temperature differences were short of being astronomical, continue on to the next section of the article for some observations.