Silverstone Decathlon DA700 Super Silent Power Supplyby Christoph Katzer on April 22, 2008 12:00 AM EST
- Posted in
Fan Speed and Acoustic Noise
Now we finally come to the most important reason for testing this unit in the first place. Silverstone mentioned their results should be much better than the new Modu82+ and Pro82+ series from Enermax. After looking at the charts, we can definitely say Silverstone is telling the truth and not just blowing hot air. The fan spins at very low RPMs until the unit reaches 350W of load. It then increases its rotational speed but still maintains a low noise environment. It is only at around 1200RPM - a load of 550W - that the fan starts to produce more noise, which is clearly visible on the acoustic chart above.
The highest spin we measured is 1600RPM which produces acoustic noise of up to 23dB(A). This might sound like almost nothing, but as we have mentioned in past reviews the sound pressure levels do not necessarily show the perceived loudness by human ears. A fan can have low SPL but still sound loud to human ears. The fact is that the DA700 power supply will be audible while running with full load, but if you mount it in a PC case the noise will be much less noticeable. Given most users are not likely to draw more than 350W from their power supply - even with SLI or CrossFire - and many users probably won't hear this PSU over the noise of the rest of the system.