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    P150HM Fan Behaviour

    Discussion in 'Sager and Clevo' started by HeavenCry, Jan 8, 2012.

  1. HeavenCry

    HeavenCry Notebook Virtuoso

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    Can someone clear up the fan behaviour for me (maby an official answer from a reseller)?
    Ive read about it before in the owners lounge but i havent found a definite answer. Sometimes i can hear the fans pulsing (at low revolutions) like theyre not getting enough voltage and at full blast theyre reducing and upping speed at regular intervals. Is this the EC control normal behaviour or is it just defective fans?
     
    HeavenCry, Jan 8, 2012
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  2. draxen

    draxen Notebook Consultant

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    I experience pulsing too but only on my CPU fan and not from my GPU fan.
    It only occurs when I have used the fn-1 override to max out the fans.
    Very odd but I've got used to it now - the fans look easily replaceable anyway if something goes wrong.
     
    draxen, Jan 8, 2012
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  3. HeavenCry

    HeavenCry Notebook Virtuoso

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    Well im just trying to figure out if i should ask for a fan replacement.
     
    HeavenCry, Jan 8, 2012
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  4. yhchoong

    yhchoong Notebook Consultant

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    I checked with my reseller before - it's normal behaviour, the pulsing occurs when temperatures are low but you use fn-1 to max them out. It's designed to be like this and happens to everyone so don't worry about it!

    The pulsing ceases at higher temperatures with fn-1 after you hit a certain treshold.
     
    yhchoong, Jan 8, 2012
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  5. HeavenCry

    HeavenCry Notebook Virtuoso

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    Well i get fast pulsing at low rpm and when maxed they reduce speed at a few second intervals and increase again which is even more noticable.
    Just after my last post though my cpu fan started rattling badly... Seams that one will need replacing.
     
    HeavenCry, Jan 8, 2012
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  6. SMOKE_SKULL

    SMOKE_SKULL Notebook Deity

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    My CPU fan doesnt even turn untill I start doing something CPU intensive. I was worried when I saw it not turning and monitored it while running 3D Vantage. It came on slowly and then during the CPU testing it really sped up. Then stopped after the test was over. These cpu really run cool, and the factory heatsinks are very good at dissipating the heat.
     
    SMOKE_SKULL, Jan 8, 2012
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  7. HeavenCry

    HeavenCry Notebook Virtuoso

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    Thats probably why i didnt notice the rattle before, the CPU fan turns on really rarely and even then spins very slowly until youre doing something really intensive :).
     
    HeavenCry, Jan 8, 2012
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  8. yhchoong

    yhchoong Notebook Consultant

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    Rattles are another thing altogether, just have your reseller send you a new fan. It's a simple 3 minutes job to remove and replace either fan.
     
    yhchoong, Jan 8, 2012
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  9. HeavenCry

    HeavenCry Notebook Virtuoso

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    I know, i already did. Mainly i just wanted to know if the pulsing and speed changes at max speed are normal.
     
    HeavenCry, Jan 8, 2012
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