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    Which fan turns on?

    Discussion in 'HP' started by hoosier, May 11, 2006.

  1. hoosier

    hoosier Notebook Guru

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    I have a V5000 Presario and the fan from the back left side of the latop turns on an blows out hot air. Is it the CPU fan that turns on? How does it know when to turn on? Is there a heat sensor in the comp? :confused:
     
    hoosier, May 11, 2006
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  2. Szadek

    Szadek Notebook Geek

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    Umm only fans in most notebooks are for cpu or videocard (as far as I know)
    All the ones I've worked with were for CPU with heatsinks or metal "thermal shields" with heat pipe to the CPU fan. And yes, there are thermistor(s) on the system board that govern the fan's on/off and speed functions.
     
    Szadek, May 11, 2006
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  3. hoosier

    hoosier Notebook Guru

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    there is one vent at the left backside of the laptop. Which fan do you think that one is...for the video card?
     
    hoosier, May 11, 2006
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  4. miner

    miner Notebook Nobel Laureate

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    There is only 1 fan in the V5000 series which cools both the cpu as well as the graphics card. The fan is most probably controlled based on the heat sensors and is controlled by the BIOS. There is no way to chage this by the end user.
     
    miner, May 11, 2006
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  5. dthurston

    dthurston Notebook Enthusiast

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    This is not generally true in modern laptops: usually it's controlled by ACPI, and if you poke around enough you can change the trigger temperatures. (There's also usually a much higher hardware cutoff that is not controllable.) Usually there's no reason to adjust this, though.
     
    dthurston, May 11, 2006
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  6. vassil_98

    vassil_98 Notebook Deity

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    ZV6000 has two fans, one for the cpu and one of the GPU. I don't think I've ever seen the GPU fan on, but I don't game so...
    V5000 uses the same GPU but a cooler processor, so it may do without the second fan, I don't know. For sure, however, what you hear is the CPU fan.
    V5000 and DV5000z have a common bug, that is MobileMeter (or any other program that measures CPU temps) does not work; other HP Turion notebooks support MM. The fan on my Turion, with the latest BIOS, turns on at 57C and I'm pretty sure it is the same for V5000.
    If a considerable number of people demand it, HP may release a BIOS which supports temp measuring. Drop them an email or something, and hope you're not the only one :)
     
    vassil_98, May 12, 2006
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