PC Power & Cooling Silencer 750 Quad CF-Edition

Acoustics and Fan speed (Ambient 25-50°C)

At a higher ambient temperature our noise results are quite different. The fan runs at much higher speeds overall and thus generates more noise. In our opinion, the results are not visible enough on our graphs. This might be visible by adding a Sone test which attempts to measure the actual loudness heard by the human ear. Sone cannot be tested with a normal setup but we are looking into getting the proper equipment for future testing.





Up to a medium load the fan rotates at an average speed but it's still much noisier than at room temperature. From 60% on fan speed is clearly increased and the 750 Quad became the loudest PSU we have heard so far. It tops out at a maximum 4200 RPM, at which point we would compare the noise levels to that of a hairdryer. The result is a very high SPL of 45 dB(A) from 1m, which can also result in a very annoyed user sitting in front of the PC. Silencer? Certainly not at these temperatures and loads, but then creating a PC that approaches silence while drawing over 700W of power is more than just a little difficult.