Fan Size Matter ?

[FewQuestions]

So there's a 120x120x17 Slim Version Case Fans , And 120x120x27 Thick Version Case Fans. Does it really matter ? is it better for the thick or slim versions ? and in what way ?

thanks in advance!

[bellabichon]

In simple terms, slim = less airflow, thick = more airflow. Slim fans are great if you have limited space on your case/radiator, or if you need a more compact cooling solution for aesthetic reasons. Thick fans will provide more airflow over your components, giving you better temperatures. If you've got the space in your case for thick fans, they're probably the better option. If you don't have much space in your case, go with the slim ones. 

[bmx6454]

the thicker 27mm are going to grab more air, not by a lot, but they will, so better cooling. the thinner fans are mostly an aesthetic/fitment thing. if your not going for looks, get the thicker ones.

[FewQuestions]

@bellabichon I'm using Lian Li Razer Case , so ill have 3 down , 3 on the middle, which do you recommend me getting ?

 

[FewQuestions]

Apparently there's only 1 Quantity left for the thick fans and 1 for the slim , is it fine if i mix them up in one case ? it wont matter ?

[Light-Yagami]

18 minutes ago, FewQuestions said:

So there's a 120x120x17 Slim Version Case Fans , And 120x120x27 Thick Version Case Fans. Does it really matter ? is it better for the thick or slim versions ? and in what way ?

thanks in advance!

IN short:

 

There are two types of fans:

1. airflow fans - designed for max airflow (wide apart fins, usually slower speed, don't have much pushing power against a radiator)

2. SP fans - designed for max static pressure (tightly packed fins with tight tolerances against the circular frame, high speed, high pushing power traded for some airflow)

 

thickness usually isn't a great indicator of fan's performance, but thinner fans are usually airflow focused.

 

As for the size: 120mm is standard, 240 are big and usually airflow only