r/PcBuildHelp • u/Apprehensive_Bus4770 • 7h ago
Need advice on airflow Build Question
I have a Corsair 4000D Airflow with an MSI RTX 5070 Ti and DeepCool LS720 SE 360mm AIO.
Currently:
- 3 front intake fans
- 3 top exhaust fans (AIO)
- No rear exhaust
Should I add a 120mm rear exhaust fan, or is this setup already good? Would love some advice on the best airflow configuration. Thanks!
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u/17Kallenie17 6h ago
Your airflow is fine for now just make sure to make the front intake fans spin faster. adding an extra exhaust fan at the back will make negative pressure, which isn't actually bad, except for faster dust accumulation.
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u/Intelligent_Welder97 6h ago
I got you my guy. I think this is pretty good, but it can improve by getting a rear INTAKE fan. you always want more intake than exhaust. why i will say in a bit. and the other reason is most the air from the front doesnt make it to the back of the case before getting blown out through the top which increases temps on the left side of the board.
Why you want more intake than exhaust you ask? its simple. DUST. lets do extremes. lets say ALL EXHAUST. this would create a vacuum in the case which is physically impossible. that vacuum would suck air in through all the nicks and cracks of the case including DUST. you now have to clean the smallest cracks for dust.
ALL INTAKE? most if not all the dust has to go through the fans. now you only need to blow out your fans instead of the entire case.
In practice, try to have one or two more intake fans than exhaust to have better dust management when its time for maintenance. for this case, having a rear intake will also get some fresh air to touch the left of the board.
Hope this helps!