120mm Case Fans or 140mm case fans

I can't decide between case 120mm fans or 140mm. Sound isn't really a problem for me. Is their any major difference cooling wise? Cause I need to keep my R9 390 cool.
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  1. Best answer
    Identical fans, at identical speeds, the 140mm fan would move more air.
    Identical fans, at identical airflow, the 140mm fan would be quieter (lower RPM).

    If you have the room for 140mm fans I recommend them, simply due to the choice between higher airflow compared to 120mm counterparts, or lower noise levels compared to the same airflow.
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