Good quality, but not whisper quiet
by Ian HarrisonAfter my existing fans started getting noisy (golf ball with red leds) decided to opt for some better quality ones, so went for these.I've used noctua fans on heatsinks before and they have been great, quiet too so was expecting the same of these, especially since I went for the lower rpm version.However, if attached to the case with standard fan screws they make a lot of noise even at slow speeds, probably amplified by the case. Managed to scrounge up some noctua rubber mounting pegs from earlier buys (these are bare bones and don't come with any) which has helped a lot but the noise is still there, whereas the old fans you couldn't hear a thing on low speeds even when using fan screws.I may be rather picky, but since my GFX card and PSU fans switch off on low load, and my cpu heatsink is large enough to have a 120mm fan on low the sound is noticeable.They are well built fans though, but if you want a really quiet case suggest either a different fan or purchase some isolater pads or similar to reduce the motor noise.
