which should I choose

[KasperNS]

so I going to buy some new fans soon probably, and I'm wondering if higher CFM will be noticeable.

Here are the two setups that I'm thinking about doing. And yes, I don't have a back exhaust fan on purpose.

 

3x120 86.9CFM front intake with 2x140 109.22CFM top exhaust.

3x120 57.3CFM front intake with 2x140 73.63CFM top exhaust

 

Will I actually see any difference in temps by buying the higher CFM fans? The reason I'm thinking about buying the lower CFM fans are because of lower noise.

[Nerdtality]

Even a small degree in temperature change can go a long way. Especially when overclocking. Unless you want a quite build, I would go with the  3x120 86.9CFM front intake with 2x140 109.22CFM top exhaust

[KasperNS]

5 minutes ago, Nerdtality said:

Even a small degree in temperature change can go a long way. Especially when overclocking. Unless you want a quite build, I would go with the  3x120 86.9CFM front intake with 2x140 109.22CFM top exhaust

I was more thinking about how big of a change it would be. But thanks for answering anyway

[MayTayPi]

I don't think it will make that much of a difference, but it's impossible to predict because of so many variables. If it was for me i'd go with lower noise. 

[Deli]

With three 120mm intake and two 140mm exhaust. High or low airflow case fans won't make much difference. You've pretty much reach the point of diminishing return. Unless you have three super hot GPUs in your case.