Airflow System need help!

Hello, I am wondering if my airflow system in my computer is ok, here it is.
2 fans in the rear of my case blow air out with the power suply dual fans.
Cpu fan that come with the cpu blowing air on the cpu.
1 fan on the side of my case *attach to the side  that can be remove to open the case* which I do not know if it should blow in or out?... (right now it blow air in the case directly to the cpu fan)
Basicaly, Side fan blow air on the cpu fan that blow air on the cpu and the 2 rear fans with power suply blowing air out whith the power supply help... I do not have a front fan that should blow air inside, does the front fan is very important, should I take the side fan to put it in front instead?

Fans in the front and sides should blow air in. CPU fans should go the direction that the HSF makers recommend based on design. Rear and top fans should blow outward. You also should have a rear fan at the least and not depend on what the PSU fans are doing. Otherwise you can overheat and burn out the PSU.
Rear and front case fans should be controlled off the MB in most cases. Sometimes there are not enough jacks to control all your fans so you should set then to blow as much air as you can stand noise wise if you are doing your own wirung harness or get a seperate fan controller with temp probes for more accurate controil over case temps.

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