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All case venting is a little different for other cases.I agree with you, you are too lazy to do your own work so instead ask us to do it for you. Saying you are not good at math is a lame excuse. The math is simple and I'm sure you have a little calculator handy or 10-key pad on your computer. Then look up manufacturers' fan specs for the basic data.
All filters are different.
All fans are different.
All systems airflow is different
All systems use different fan curves and different component TDP output
TDP output also depends on component load.
Etc.
Etc.
PH-F140MP spec 68.1cfm, 1.62mm H2O & 25.3dB(A) .. 2x fans = 136.2cfm, 1.62mm H20 & 28.3dB(A)There has been all kinds of fan testing done with all kinds of data out there, including built systems with 120mm and/or 140mm fans and their resulting temps.
PH-F120MP spec 53.3cfm, 1.72mm H2O & 25.0dB(A) .. 3x fans = 159.3cfm, 1.72mm H2O & 29.8dB(A)For MP fans 3x 120mm are slightly better than 2x 140mm and slightly more noisePH-F140XP spec 85.19cfm, 1.77mm H2O & 17dB(A) .. 2x fans = 170.38cfm, 1.77mm H2O & 20dB(A)
PH-F120XP spec 61.1cfm, 1.72mm H2O & 27dB(A) .. 3x fans = 183.3cfm, 1.72mm H2O & 30.8dB(A)
For XP fans 2x 140mm are similar but much quieter
PH-F140SP specs 82.1cfm, 1.33mm H2O & 19dB(A) .. 2x fans = 164.2cfm, 1.33mm H2O & 22dB(A)
PH-F120SP specs 54.4cfm, 1.29mm H2O & 24.2dB(A) . 3x fans = 163.2cfm, 129mm H2O & 29dB(A)For SP fans 2x 140mm have similar performance but much quieter.
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