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How to make a CPU fan blow air directly out of the case?



So my CPU fan pulls air from the cooler and blows it towards the case fan. If I could make a tunnel between the CPU fan and the computer case, then I would not need the case fan since the CPU fan would cool the CPU and pull air out of the case. This way noise level would be reduced.

Does such a tool exist? Or what's the best way to make it myself? I would imagine that tunnel is 120X120mm in cross-section, flexible in shape, and fixed using the 8 fan screws and holes.
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  1. Best answer
    I don't think that's best idea because you would take away cooing from VRM section which is right between CPU and exhaust place/fan. Just CPU cooler fan may not be enough to take all the air out of the case. Total effect would not be any better than not having backside fan at all.
  2. CountMike said:
    I don't think that's best idea because you would take away cooing from VRM section which is right between CPU and exhaust place/fan. Just CPU cooler fan may not be enough to take all the air out of the case. Total effect would not be any better than not having backside fan at all.


    This! a hundred times this! People focus on cpu heatsinks to much and too little con case cooling. Want a tunel? create a WIND tunel with exhausts and intakes (exhausts in the upper part of the case, intakes in the lower part) control them via software that matches temperature to fan power and it will be silent enough when not under high load.
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