| Electronics > Repair |
| Unusual Thermal Paste |
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| perieanuo:
--- Quote from: T3sl4co1l on September 07, 2024, 07:29:33 pm ---Pictured is not phase change. If it were, you wouldn't be able to pry it off, at least not without heating. Thermal paste never needs to be replaced, in and of itself. Only if separation has occurred (flowed out of joint, oil sweating, dry filler compound), or the joint is opened and the paste must be redistributed (or added) to maintain an excess to squish out on reassembly. Tim --- End quote --- all do respect, don't agree, i saw multiple laptops where the thermal paste un the uP was dried and ineffective, thermal shutdown occurring when using sw like prime for pushing mcu to max, after "changing" the paste with a good one all was fine. there are low cost thermal paste that just dries (the compund element), you left with some scrapped dried metal stuff |
| Haenk:
--- Quote from: perieanuo on September 09, 2024, 09:55:43 am ---all do respect, don't agree, i saw multiple laptops where the thermal paste un the uP was dried and ineffective, thermal shutdown occurring when using sw like prime for pushing mcu to max, after "changing" the paste with a good one all was fine. there are low cost thermal paste that just dries (the compund element), you left with some scrapped dried metal stuff --- End quote --- I agree with your disagreement. Ever so often I stumbled upon white thermal paste, which hardened and became crusty. Probably some cheap stuff and not silicone based. Then again I had decades old computers with thermal paste looking "like new" that could easily be re-used. |
| T3sl4co1l:
I would call that "separation" then -- though if the oil fraction just up and left (evaporation? polymerization?) it wouldn't be my first choice of word! There's also the case where grease was used inappropriately with Sil-Pad or the like, and ends up congealed, but I'd say that's a separate issue. Tim |
| coppice:
--- Quote from: T3sl4co1l on September 07, 2024, 07:29:33 pm ---Thermal paste never needs to be replaced, in and of itself. Only if separation has occurred (flowed out of joint, oil sweating, dry filler compound), or the joint is opened and the paste must be redistributed (or added) to maintain an excess to squish out on reassembly. --- End quote --- Some pastes say they need to be replaced at intervals. In most uses they still seem fine after years of operation, when you finally remove the heatsink for some reason. Other times the same brand of paste has clearly "dried out" in some sense, turned to a powder, and seems unlikely to have been doing a good job of filling the empty voids in our existence. |
| T3sl4co1l:
--- Quote from: coppice on September 09, 2024, 05:05:42 pm ---Other times the same brand of paste has clearly "dried out" in some sense, turned to a powder, and seems unlikely to have been doing a good job of filling the empty voids in our existence. --- End quote --- That's when you realize you left the cap off the bottle of whiskey. Tim |
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