Noctua NH-L9x65: Fan Noise Measurements
As per request from many members of the enthusiast community, Benchmark Reviews has added noise measurements to our CPU cooler testing methodology. Each test is conducted in a noise isolated room, during the night time to avoid any minor disturbances caused by normal daytime activities near our location. Our base ambient temperature was measured at 15 dB for each of our tests. Noise was measured using a Brüel & Kjær type 2225 sound level meter located at 1 meter from the fan/fans. Fans were placed so that the axis of rotation of the fan is perpendicular to our line of measurement. For our dual fan noise measurements, fans were placed in series (facing each other) with a 10 cm gap between them. All fans were tested at 12 Volts.
The included fan provided by Noctua has the model name NF-A9x14 and is available for purchase for $19.99 (Newegg). Being slim can actually help reduce the noise caused by the fast moving small blades of smaller fans proven by Noctua’s 92 mm fan almost beating any other fan in our single fan noise measurements test. Most notably it was 3.6 dB lower than the Intel reference cooler at 100 rpm, which is a measure of improvement. These are great number for such a small fan.