Test System & Test Results
TweakTown uses a different method for testing CPU heatsinks which allows for an even playing field across all product tests. We feel that by using the same ambient temperature and strict lab-like testing procedures we are able to accurately compare one product to another. More information on our testing procedure can be found in the T.E.C.C. article here.
With a cooler of this nature you have to take into consideration the CFM produced by the fan included in the kit. These results are with the fan running at 7.5V, so considerably less CFM than the almost 50 CFM this fan tops out at. The results aren't chart topping, but do show this cooler is on point with the Jing and Hati; both silent cooling solutions.
The load testing results are confusing to me. The results show mediocre performance at best with the fan that comes included with the Freezer 13 PRO. Don't get me wrong, these are respectable results for what you get, but at what temperature does Arctic Cooling consider this cooler 300 Watts capable? - With their test results I'm seeing a processor under 200 Watts and in a very cool room. Without replacing the fan I wouldn't want to use this cooler on something that hot.
Where this fan makes up for its mediocre temperatures, is the fact that at low RPM the fan is almost inaudible, as shown by the lowest result of any cooler tested to date.
With the fans at full speed the results are very good as well. The ISGC-300 is the only cooler I have tested with less noise, and up to now I sort of thought it was a fluke. It's good to see this low of a noise level, but as you saw, it did affect the performance of the cooler.