Airflow inside a case!

[MrChaosZIE]

A case that has a front intake fan that's 230mm and a bottom one that is 120mm, I have a option to put 2 fans at the top and one at the back, all of them are 120mm. I should put them as exsaust ones, right?

 

[scout_03]

in from front and bottom out on top and back .

 

[McHenryB]

Fan placement, and how many to use, is a complicated affair. Have a look at this article, which tests various layouts:

http://www.bit-tech.net/hardware/2012/02/10/the-big-cooling-investigation/1