120mm vs 140mm fans

[coldine]

Hello. I have Corsair 500R case and i am planning to change my Rear fan. The case supports one 120 /140mm in rear. I been looking through many Corsair Fans and i cant decide which one is better.


http://www.corsair.com/en/air-series-af120-performance-edition-high-airflow-120mm-fan

or


http://www.corsair.com/en/air-series-af140-quiet-edition-high-airflow-140mm-fan

 

[legend001523]

The 140mm is better, cause it's bigger for a start, so more air can be moved, and it's also the quiet edition, so it won't be loud and it comes with interchangeable rims

 

[Adroid]

I would go with the 140mm for higher cfm on exhaust and quiet operation, where static pressure is not an issue.

If you are replacing intake fans I might recommend something different.

 

[Dark Lord of Tech]

You will like the Quiet Editions 140mm , they move a decent amount of Air , I have them in my 750D.

 

[EasyLover]

Go for AF 140 Quiet Edition. It has CFM of 67.8 which is a good figure with sound level of 24 dBA. Don't buy Performance edition AF120 fans as they have CFM of 63.47 which is less than the AF 140 fans and their sound level is 30dBA which is higher than the AF 140 series fans.

|Keep in mind the two factors when buying fans

1. Their air flow should be high i.e CFM should have high value
2. Their noise level is low i.e dBA should have low value

AF140 beats AF120 in both these criteria also large the fan is, less it spins with more air flow.

 

[Scampi]

They will shift similar amounts of air.

120mm has a smaller surface area for smaller air volume, but runs faster to compensate.
140mm has a larger surface area for larger air volume, and can run slower as a result.

Bottom line, the 140mm fan will be quieter if that matters to you, compared to the price difference.