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T43p thermal pad replacement

T40/T41/T42/T43 Series
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Enig
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Posts: 83
Joined: Thu May 20, 2021 10:53 am
Location: Copenhagen, Denmark

T43p thermal pad replacement

#1 Post by Enig » Thu Jul 20, 2023 8:27 am

My T43p fan could hardly move and was very noisy when it did. After a long cleaning and a bit of oil it now operates and sounds healthy - no guessing how long that will last, but hey - it works for now :D

Have given the CPU some new thermal paste, and I also want to replace the old GPU thermal pad on it.
After googling for a while I have been unable to find out exactly what thickness I'll need.

Have been looking at Arctic TP-3 1.5mm - would this be the correct thickness for a T43p?
https://www.arctic.de/en/TP-3/ACTPD00054A
Thinkpads: Too many. Currently playing with an IBM 535

Gonzaleitor
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Location: Buenos Aires, Argentina

Re: T43p thermal pad replacement

#2 Post by Gonzaleitor » Mon Jul 24, 2023 11:26 am

You should use a Caliber and measure the thickness of the pad. I guess that if you don't have one a ruler should be enough, as those things are standard.

RealBlackStuff
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Re: T43p thermal pad replacement

#3 Post by RealBlackStuff » Mon Jul 24, 2023 12:25 pm

AFAIK both 1mm and 1.5mm pads work fine.
Lovely day for a Guinness! (The Real Black Stuff)
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Enig
Freshman Member
Posts: 83
Joined: Thu May 20, 2021 10:53 am
Location: Copenhagen, Denmark

Re: T43p thermal pad replacement

#4 Post by Enig » Tue Jul 25, 2023 2:12 am

Yeah I guess it wass time to pull the bandaid and have a proper look.
The outside of the pad was covered in black goo and hard to measure whike installed, so I decided to pull off the pad entirely.

And it was not what I was extecting - like RBS suggests the whole thing it's somewhere around 1mm (don't have calipers for more precision), but the black goo that was on it was hiding a nice thick copper block and the actual thermal pad is very thin - thicker than a couple of sheets of paper but not by much.

I have cleaned the copper and am going to try to attach the cooler directly to the GPU IHS with some Artic MX-4 between and see where that gets me - if too hot I'll have to buy a very thin pad instead :)

Thanks for the help guys.
Thinkpads: Too many. Currently playing with an IBM 535

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