[biff]

I recently switched the fans on my rads over to Noctua NF-P12's and I'm not happy at all with them. They have a whine to them like what a car horn several blocks away would sound like. I used the speed reducers to slow them down, currently using a black one (whichever that one is) to feed two fans with a 'Y' splitter. They sound not too bad now but as soon as I put me case sides on there is vibration. My crappy CM case fans don't do that and TBH sound better. The CM's may not be more quiet as a dBm meter would read but the sound signature is much more bearable. I'm not sure what the performance difference is between the two, I'm just starting temp testing now so the Noctua may 'work' better but they're not going to stay given the noise issues.

So that said what other options do I have?