Dell Inspiron 7586 Thermal/Temp question

Discussion in 'Dell' started by Pagis, Jul 16, 2019.

  1. Pagis

    Pagis Notebook Enthusiast

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    So, not so long ago i picked new Dell inspiron 7586 laptop as my on-the-go machine.

    I wanted to squezee as much as I could, so I did following tweaks:

    I re pasted cpu (i7 8565u) with liquid metal (cool laboratory)

    I undervolted my cpu by -105mv

    I turned off tdp limit in XTU.

    So now my cpu draws 50w and runs 4.1ghz on all cores, but it overheats quite fast. Is there anything I can do to cool it down more or this is just a laptop/cooling limitation and I'm just pushing it too hard? Normally this cpu should draw no more than 25w.
     
  2. ralba

    ralba Notebook Enthusiast

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    hey Pagis,

    Here are some recomendations, I`m owner of a Inspiron 5480 with a very similar configuration, I have the i5-8265u, mx150, 16gb, 256gb ssd.

    Unfortunatelly this laptop have a very poor thermal dissipation system, with a dual heatpipe it would be a little monster.

    I believe that all you did is good, I would recommend to properly refrigerated the VRMs, if you search about XPS line you`ll see, by removing the TDP limit easily you will fry your VRMs, so they need a better cooling solution be sure to use low w/m2 thermal pads for this, you can also add a layer of a high wattage thermal pads (like the 17w/m² fuji ones) in line with the main heatpipe "increasing" it's transmission and thickness, additionally, check if on the bottom lid of the chassis there is a plastic piece around the fan area, my system came with this blocking the air flow, it caused the entire system to overheat, I was not able to use the MX150 even disabling the CPU turbo and undervolting it to 850mv, it was hitting 75C that trips the power limit of the GPU, after I removed it temperatures dropped 10C (pic attached)
     

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  3. Pagis

    Pagis Notebook Enthusiast

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    Hey, thanks a lot! What thermal pads do you recommend? Would IC graphite pads work?
     
  4. ralba

    ralba Notebook Enthusiast

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  5. Pagis

    Pagis Notebook Enthusiast

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    I added fujipoly pads on the heatpipe and did few tests with removed back lid. I was able to sustain full clock speeds for longer period without overheating. I will add same pads on my vrms little bit later.

    I've managed to get 852 in Cinebench r15, which is really good for ulv cpu in a cheap ultrabook.

    [​IMG]

    For some reason picture is not showing up. Here's a direct link: https://ibb.co/FXHT59V
     
    Last edited by a moderator: Jul 23, 2019
  6. ralba

    ralba Notebook Enthusiast

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    wow! that's insane!

    did you notice a temperature decrease after using the fuji? It should not be something aggressive but around 3-5°C would be achievable on sustained load

    take some pictures of internals, how it is applied the thermal pads afterwards, this would be very helpful for others
     
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