I can feel air blowing out of the CPU fan, shouldn't it be blowing air onto the CPU?
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Thread: I can feel air blowing out of the CPU fan, shouldn't it be blowing air onto the CPU?

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  1. #1
    Join Date
    Jun 1999
    Location
    UK
    Posts
    106

    I can feel air blowing out of the CPU fan, shouldn't it be blowing air onto the CPU?

    ?

  2. #2
    Join Date
    May 1999
    Posts
    90
    The cpu fan should blow toward the heatsink,(cpu) never seen one that didn't anyhow!!

  3. #3
    Join Date
    Mar 1999
    Location
    Chgo, Il USA
    Posts
    535
    Some of the newer, high performance heat
    sink/fan combinations pull air through the
    heat sink. I cant remember what site I read
    this at but I think it's the Alpha, which
    is one of the very best, that actually ran
    hotter when set to blow through/into the
    heat sink.

    It has something to do with allowing the
    metal of the heat sink to more evenly
    transfer the heat to the fins to be carried
    away by the airflow.

    I can see how that might reduce "hot spots".

    The heat sink may feel hotter, but the cpu
    is "more uniformly" cooled.

    Hit a few links at some of the overclock
    sites, watching for cooling sites in
    particular, and you should find the articles
    pretty easy.


    [This message has been edited by MGallik (edited 07-11-99).]
    The more I knows, The better it goes.

  4. #4
    Join Date
    Nov 1998
    Location
    Sydney, NSW, Australia
    Posts
    705
    I assume that what you are talking about is that the CPU fan is meant to blow air down into the heatsink but when you hold your hand above it you can feel air pushing against you. The reason for that slight buffeting is because the fans, as well as sucking air, also produce turbulence. They do this as well because the airflow through the heatsink is not completely free, there is some resistance there. If you unscrewed the fan and held it in mid air the turbulence decreases (but then your CPU melts! Quick screw it back on!!!!)

    As long as the fan moves in the correct direction so as to push air towards the heatsink, don't worry about it just let it do its job

  5. #5
    Join Date
    Jun 1999
    Location
    UK
    Posts
    106
    cheers, and by the way it's a double fan system.

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