Air Flow Help!

[Wensi]

I built my first PC recently and I have no idea how air flow works. I know more air has to come in than out but that confuses me and I need smart people like whomever is reading this to help me.

 

Red - Case fan air movement

Blue - CPU fan air movement

Green - GPU air movement

 

Pretend that the water cooling contraption in the picture doesn't exist. I use a 120mm fan on the top half of where the water cooler is. I have the Hyper 212 EVO as my current CPU cooler and the fan is on the side with the RAM and blowing towards the left of the case (in this picture).

 

I think I did this completely wrong and if someone would like to help me that would be great!

[Nacho Marco Segui]

Rear fan should be exhaust, other than that, it is fine

[Charcoal_]

It depends which way round you put your fans. They usually have arrows on the side.

[LogicalDrm]

This is good video for basic airflow

 

Besides it. Airflow inside case works so that air is moving where fans are pointing it. CPU coolers fan/s should always be pointing to where your exhaust fan it. Its rare that you would need to use rear fan as intake for CPU coolers aid. If you end up doing so, you will need to get dust filter for it.

 

[Allshevski]

If you can, put two fans in the front blowing into your system and rear fan blowing the hot air out. This way you will have clean, positive airflow.

[airdeano]

some things:

your front fans are filtered. so they will not flow as much air as fans without filters.

what you have there is fine (provided you install a filter on the rear i/o fans (silverstone 120mm).

could leave the rear i/o fan exhaust and let the top intake air and actually, the case is large enough to have all fans intake (filtered) and allow the exhaust expel naturally through the rear mesh in the rear panel. heat rises (convection) only when airflow is not present.

[OneshotOtter]

You want to have the rear fan exhaust.  And for decent airflow and neutral air pressure you want to have equal intake and exhaust.  If you go for positive airflow you have less chance of dust getting into your rig.  And remember, hot air rises!

[LogicalDrm]

21 hours ago, OneshotOtter said:

And remember, hot air rises!

*sigh* That has no effect inside case. It has some effect in room where temps are over 30C. It has more effect when case is placed in small, closed or narrow space, like right under table. In case fans more air faster than what normal movement of molecules would.