Be sure to check the Test system and methodology on the previous page if you have any queries about how the results shown below were achieved. One thing that is vital to mention is that the NF-A14 ULN results in the graph were taken at 800 RPM and 650 RPM respectively not 1200 RPM and 900 RPM. We have included these results on the graph anyway because it is easier to display the results without adding in two extra data series for 800 RPM and 650 RPM.
As you can see the NF-A15 PWM fan definitely offered up an advantage over the 140mm fans at equivalent speeds. This advantage on our system is around 2 degrees. At 900 RPM the NF-A15 PWM fan gives about 1 degree better performance than the NF-A14 FLX.
I was surprised to see the Noctua 140mm fans blow away the supplied Thermalright 140mm fan at lower RPMs. The NF-A14 FLX offered 3.5 degrees better performance than the Thermalright TY-140 at 900 RPM. The NF-A14 ULN offered 1.5 degree better performance at 800 RPM versus the 900 RPM Thermalright fan.
The key things to draw from this graph are that the NF-A15 PWM fan does offer better performance than a 140mm at equivalent speeds. It is also quite clear that the Noctua fans excel in offering high airflow/performance at low RPMs, very useful for people who want quiet but cool systems.
I couldn’t agree more. Noctua do make excellent fans that are worth every penny. I’ll have to exert a bit of pressure on my suppliers to send me a couple of test samples which will probably end up in my personal rig permanently.