Acer Aspire 5740G Owners Lounge

Discussion in 'Acer' started by downloads, Mar 16, 2010.

  1. Audizzz

    Audizzz Notebook Consultant

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    On the corner of this cpu I see some dark spot. Could be defective then.
     
  2. Audizzz

    Audizzz Notebook Consultant

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    Thank you.

    I returned defective i5-560m, and ordered new one. will see.
    What is your full model number 5740g-xxxxx.....? Thanks
     
  3. downloads

    downloads Super Moderator Super Moderator

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  4. phoenix222

    phoenix222 Notebook Enthusiast

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    does anybody know how exactly the automatic fan control at the acer 5740g works and upon which sensor values it decides the fan speed because it obviously doesnt seem to be the cpu temp?
     
    Last edited: Mar 9, 2019
  5. Andy53

    Andy53 Notebook Consultant

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    Why do you think it's not the temp ?
    Only when turning on it spins for testing purposes I think, and properly some speed-tables in bios related to the temp.
    Put a quad-core in it and you will see. :D
     
    Last edited: Mar 9, 2019
  6. phoenix222

    phoenix222 Notebook Enthusiast

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    because the automatic fan control is somehow defective at mine acer5740g, manual fan regulation with RWE still works fine but in auto mode fan keeps off until cpu hits 90°c under prime95 then it cools the cpu to 70°c and turns off again. so my guess is the fan controllers uses an own temp sensor that somehow measures heatsink temp itself and that one became defective?
     
  7. unifilek

    unifilek Notebook Enthusiast

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    No fan table in this laptop is f***up I use to have i7 quad cor in it and was going from nothing to full blast because of temp while on low end i5 or i3 was fine.

    Sent from my Redmi Note 4 using Tapatalk
     
  8. Andy53

    Andy53 Notebook Consultant

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    @phoenix222

    Looking at the schematics at page 38 you can see an i.c. U40, who is monitoring two transistors, Q34 and Q20, used as a
    thermal diode for T8 and System, and capable to close the system when temp exceeds 90c.
    Don't now where the are placed exactly, but in a modern system there are more temp. measurements, at least in the CPU, so he will now when to Idle.

    Here a screenshot of HWiNFO 64, where you can see and check if the censors are working ,

    sensor status.jpg

    @unifilek

    When it was working fine with i3 i5 , then maybe the heat was so massive with i7, there was no time for a lower rpm :rolleyes:
     
  9. Audizzz

    Audizzz Notebook Consultant

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    I received new cpu i5 560M it works now, thank you

    How do I check if intel speed step is working now? Do I need to download driver for this cpu? Does anyone have a link for driver?
     
  10. downloads

    downloads Super Moderator Super Moderator

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    @Audizzz Both SpeedStep and TurboBoost are enabled by default and need no drivers to work. You'd have to have an option in BIOS to disable either of those, co rest assured everything works as intended.
     
    toughasnails likes this.
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