What thermal compound is used in the Librem 5?

What thermal compound is present in the Librem 5 Evergreen for heat dissipation. How good or bad is the thermal compound?

No clue what Purism will use, but I plan on taking apart the Librem 5 once I get it, so I’m going to have to replace whatever thermal paste Purism used. I always use one of the expensive brands like Arctic Silver just to be safe.


Interested to see what you find out, will definitely checkout your thread whenever it arrives!


I’m thinking about doing a liquid metal compound, but it’s very, very hard on Aluminum

maybe make a video? I’ve never removed anything that needed thermal paste but seeing as L5 runs warm I will likely do the same and it would be nice to have a guide if you’d bless us so .

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Definitely will once I have my L5

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It’s not hard. You just have to spread the paste evenly over the chip and make sure to not put it on too thick.

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You may run into the anti-tamper device, it could be thermite! (Humor)

(That may be for the more expensive, U.S. component only ones.)


well its a hard mounted soc isnt it ? as in you cant remove the CPU if im not mistaken so what do you just apply the paste to the top of the soldered CPU ?

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Yes, the i.MX 8M Quad is soldered to the PCB. There is a metal sheet between the screen and PCB so you have to make sure that the paste is connecting the i.MX 8M Quad to that metal sheet to pull away the heat.

It is probably easier to apply the paste on the metal sheet rather than on the i.MX 8M Quad from the photos of Dogwood, but it should work either way:

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Thats awesome Purism not only made a privacy oriented cell device but a modular one too so the tinkerers can do stuff like this with minimal risk of harming components.

I’m in batch fir , so I probably wont get mine till this time next year or later but I bet it will be just as easy to accomplish .