Which is more silent? Arctic Freezer i32 (fluid dynamic bearing) vs. i32 CO (double ball bearing)

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Skyli91

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Dec 6, 2015
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I know that the i32 CO should be more durable but is the non CO version more silent?
Thank you very much! :)
 
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Skyli91

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Dec 6, 2015
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i32:
- Due to a new alloy/lubricant combination developed in Germany, the friction within the bearing is reduced and a greater efficiency is achieved. This way, there is less heat development as well as less bearing noise and you can enjoy a longer service life of your cooler.
- Cheaper

i32 CO:
- "CO" stands for Continuous Operation and makes the cooler suitable for PCs with non-stop operation like servers. The Japanese dual ball bearing used in the "CO" fan reduces rotational friction considerably, is significantly less sensitive to dust and high temperature and hence up to 5 times more durable than other bearings.
- little bit more expensive

I don't understand how the CO could last longer. In this particular case, the fluid bearing is the more silent? Or it's the same?
 
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