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Thread Starter 
Hello everyone, I'm planning on choosing 3 120mm noise blocker fans for use on a low fpi and low rpm radiator and need some feedback.

The choices are either one of these two:

Noiseblocker BlackSilentPro PK-PS PWM 120mm fan
http://www.blacknoise.com/en/products/it/10/Noiseblocker-NB_BlackSilent_Pro_120mm

or

Noiseblocker Multiframe M12-PS PWM 120mm fan
http://www.blacknoise.com/en/products/it/7/Noiseblocker-NB_Multiframe_S_Series_120mm

Which of these two fans is better suited for silent use on a low FPI radiator at Low RPM?

Thank you!