Side fan mounting

[kingkung]

I am new to the computer world. I have a system i built and the case i have is the cool master HAF-922. I am add 2 120mm fans to the side of the tower. Should the side fans be mounted to suck air into the system or out if the system?

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[sandorski]

Into. On rare occasions one might want it to blow out, but the vast majority of the time it is In.

 

[blastingcap]

Sandorski is right. 99% of the time you want it to blow in, in order to feed your GPU cold air. Assuming you have a discrete video card.

 

[kingkung]

ok, thank you for the feedback, i am running a Asus HD6870

 

[Nizzzlle]

You shouldn't NEED extra airflow for that card but it's always good to have some. Like everyone said, definitely blow it to get some fresh air in there. Otherwise you mess with the pressures in the case and the CPU would end up getting starved for air.

 

[kingkung]

On my haf 922. It has a pre mounted 200mm fan on top and it is mountes to blow air up and out. Should i re mount it to suck air in?

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[blastingcap]

On my haf 922. It has a pre mounted 200mm fan on top and it is mountes to blow air up and out. Should i re mount it to suck air in?

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Leave it alone. Hot air rises. You want to eject hot air out from the top of the case.

Conversely, if you have a bottom-mounted fan, you want to pull air in. I have a 140mm fan sucking cold air in from the floor and pushing it straight into my video card's intake fans.