Push-Pull new fan bought

[Dragos Manea]

Dear Tomshardware comunity,

I bought in december 2015 a Deepcool Maelstrom 120mm AIO for my cpu, during the summer i noticed that the fan expells very hot air so in my judgement i m thinking that teh fan is not enought so i bought another fan (Scythe Grand flex 2400 rpm, 96 cfm, 4,55mmh2o with a noise of 40 db) and i m thinking is perfect for a cpu cooler, high presure high cfm, decent noise. My question is can i use it without any problem with my original fan (2200 rpm, 91 cfm, 3,7 mmh2o 40 db) in a push pull configuration where the scythe is the push one and teh orginal one is the pull one? (scythe-radiator-original-case)

 

[CountMike]

I would put one with higher cfm in pull position so it doesn't impede the air flow. Pull fan doesn't need to be high pressure at all, higher volume is more important.

 

[Dragos Manea]

Problem is that the higher cfm fan is also the higher presure fan, and it is a diference of 5% between them (96 cfm vs 91 cfm) so your advice is to remove and put only the stronger fan and leave them only in push config?

 

[CountMike]

No, it's OK either way but for future reference, you don't need high pressure fans for pull and any exhaust use. High pressure is needed to overcome resistance radiators have because of relatively high density of fins.
Push pull can get you only about 5 degrees lower temps anyway but may be enough if temps are in critical range.

 

[Dragos Manea]

Thank you very much for your help.