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    Cooling modification

    Discussion in 'Sager and Clevo' started by hastur, Aug 7, 2012.

  1. hastur

    hastur Guest

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    I've been thinking for a good while on how to improve the fan cooling in my W25AES. At first I considered hooking up a higher voltage fan to the existing three pin connection, but I assume that the automatic speed adjustments (based on set voltages increased by core temperature I guess) would lead to a poor result. Please correct me btw.

    Then today I found this and remembered that my cd drive bay is unoccupied, and that many fans come packaged with molex adapters. A 1850 RPM GentleTyphoon runs at 0.09 A which seems far lower than the data here. Can't grasp how to compare watts and amps though :(

    To get on with it... could a Clevo sata connection with that adapter completely power a large desktop fan without burning out?

    This of course applies to almost all Clevo laptops and hopefully somebody nut winging it can shed some light.
     
  2. hackness

    hackness Notebook Virtuoso

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    I couldn't find W25AES service manual but I have seen P150EM's service manual, if their SATA ports are similar, that'd mean the SATA port only comes with 2 voltages, 5V (pin 2, 4, 10, 12, 14) and 3.3V (pin 16, 18, 20). Usually a 2.5" HDD uses 3W which means it's pulling 0.6A at 5V from the SATA port. Just not sure what's the maximum W the SATA port is capable to transfer.

    The fan you mentioned runs at 12V 0.9A, don't think it's a good idea. However, 5V fan under 0.6A might work.
     
  3. hastur

    hastur Guest

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    They're likely the same I should think.

    How did you get from 0.09A to 0.9A? But I suppose even if that is a mistake I wouldn't want to exceed the 5V? Using the formula W=A*V but that's likely wrong and not what's needed.
     
  4. hackness

    hackness Notebook Virtuoso

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    Oh my bad, misread a 0, but yea even if it's only 0.083A I'd try and find a 5V fan instead, not sure if 5V supply can even move a 12V fan.
     
  5. hastur

    hastur Guest

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    I've still some hope from this list. Might put a second smaller one in just to move some air away from extra cpu copper sinks. Might also email Mythlogic and see if they've tried it. Do you think the molex adapter would still provide the power even though several pins will be missing?