How to choose the air duct and noise balance of the cooling fan inside the chassis?

o (︶︶︶︶︶︶︶︶︶︶︶︶︶︶︶︶︶︶︶︶︶︶︶

I really put all seven fans in the Cool Extreme Police 37! They are all 12cm and 14cm of the extremely cold blue whirlwind series.

combined with the cool and extreme GX65W power supply, the cool and extreme storm S4 radiator and two microsatellite R577 HAWK double milk (four milk in total), we exchanged fire.

the result is two words: noisy to death ~

I still have a cool Supreme Defender, which is also lateral, and it is also two Slis of Gigabyte 67WF2 group. I don't even want to install more fans ...

In a word, it's enough. Too much is noisy ~