• I'm thinking about upgrading the CPU

    From Nightfox@VERT/DIGDIST to MRO on Saturday, January 09, 2021 15:58:33
    Re: I'm thinking about upgrading the CPU
    By: MRO to Nightfox on Sat Jan 09 2021 02:49 pm

    I've heard the surfaces of both a CPU and a heat sink aren't
    perfectly flat (though you'd have to look at them with a microscope
    to see any imperfections in the shape) - so the surfaces aren't
    making full contact with each other. Thermal paste is supposed to
    fill the gaps, which helps transfer heat.

    yeah but these are precision machined products, so i think of possibility of that being true might be slim. like i said in another post, some false statements became known as truth when it was repeated a lot.

    Even if it weren't true, I would imagine that after repeated heating and cooling, the surfaces of a CPU and a heat sink probably don't remain perfectly flat and would probably develop some imperfections in their shape after a while. Kinda like a street or a sidewalk that cracks after a while due to repeated thermal expansion and contraction (though metal isn't as brittle as a sidewalk or a street).

    Nightfox

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  • From MRO@VERT/BBSESINF to Nightfox on Saturday, January 09, 2021 18:45:41
    Re: I'm thinking about upgrading the CPU
    By: Nightfox to MRO on Sat Jan 09 2021 03:58 pm

    Even if it weren't true, I would imagine that after repeated heating and cooling, the surfaces of a CPU and a heat sink probably don't remain perfectly flat and would probably develop some imperfections in their shape after a while. Kinda like a street or a sidewalk that cracks after a while due to repeated thermal expansion and contraction (though metal isn't as brittle as a sidewalk or a street).


    well the cpu, heatsink and the mobo are sandwiched together using tension.
    so you have metal, heat and tension. maybe over time they merge together even better?
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  • From poindexter FORTRAN@VERT/REALITY to Ogg on Friday, January 08, 2021 06:30:00
    Ogg wrote to poindexter FORTRAN <=-

    Do you use the ThinkLight much? I like the way it helps to
    balance out the overly strong light from the screen and provide *something* over the keyboard work area.

    I don't use it all that often, but when I do, it's a much better solution
    IMO then under-key backlights. I don't know why, but being able to see my hands in the dark helps. I'm not a touch typist as such.

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  • From poindexter FORTRAN@VERT/REALITY to Ogg on Friday, January 08, 2021 06:33:00
    Ogg wrote to poindexter FORTRAN <=-

    What temperture are you managing for your machine?

    55-65c, after running 24/7 for a week. Depends on the ambient temp and
    what's running at the time.


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  • From Badopcode@VERT to Nightfox on Monday, January 11, 2021 07:15:40
    Re: I'm thinking about upgrading the CPU
    By: Nightfox to MRO on Sat Jan 09 2021 10:15 am

    I've heard the surfaces of both a CPU and a heat sink aren't perfectly flat (though you'd have to look at them with a microscope to see any imperfections in the shape) - so the surfaces aren't making full contact with each other. Thermal paste is supposed to fill the gaps, which helps transfer heat.
    The best thermal insulator is a vacuum. Next would be just trapped air. So the paste is an attempt to provide 100% molecular contact to the surface to transfer heat from one material to the other. BUT there is always a bottleneck between two seperate objects no matter what.
    So no matter how dry the paste if it's undisturbed it should work as long as all the molecules are still in place there. And that's the actual problem... reality is the computer is going to get bumped, moved, just the expanding and contracting given enough time it will let the dry material subtle on one side or another as dust and it leaves small holes in the paste which act as an isulator. So it's a good idea on old machines to scrap the old paste off and apply new thermal paste.
    The heat sinks on GPU's can be difficult because they don't have a form factor standard on how to apply cooling so manufactures can get pretty experimental. But they all do come off after unbolting and solving the Rubix Cube style cooling systems. Many times the heat sinks are put on with thermal tape which looks and acts like double sided tape. IMHO tape does not work as good as paste. But to get the heatsink off you usually have to slowly and carefully pry on the heatsink while you use a heat gun and good pair of gloves. :)

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  • From Ogg@VERT/CAPCITY2 to Ogg on Wednesday, January 13, 2021 22:02:00
    Hello poindexter!

    ** On Friday 08.01.21 - 06:30, poindexter FORTRAN wrote to Ogg:

    Do you use the ThinkLight much? I like the way it helps
    to balance out the overly strong light from the screen and
    provide *something* over the keyboard work area.

    I don't use it all that often, but when I do, it's a much
    better solution IMO then under-key backlights. I don't know
    why, but being able to see my hands in the dark helps. I'm
    not a touch typist as such.


    When I first received my T540, they sent me the variety that had
    illumunated keys, in error. It wasn't totally bad. There was
    still sufficient light cast from the brighter display to cast
    some light, and the light around and under the keys provided a
    cool futuristic effect. But the keyboard quality felt
    different. The key-presses felt hollow and lacked weight to
    them. Infact, some of the keys would stick at the edges of the
    frame where the keys would pass through when pushed down.

    So, that one went back to the supplier. The standard keyboard
    for the T540 felt closer to what I am used to on the T60.



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  • From Ogg@VERT/CAPCITY2 to poindexter FORTRAN on Wednesday, January 13, 2021 22:04:00
    Hello poindexter!

    ** On Friday 08.01.21 - 06:33, poindexter FORTRAN wrote to Ogg:

    What temperture are you managing for your machine?

    55-65c, after running 24/7 for a week. Depends on the
    ambient temp and what's running at the time.

    Then my 53C isn't so bad then, and the new fan and thermal paste
    are probably doing their job well.



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