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Thermal paste charts

Let's start with the AiO compact water cooling, as it is currently the most used form of water cooling and is safe enough for the inexperienced. The Liquid Metal Pad has a burnin, so that we have heated the CPU to 75°C Tcase for a short time in a controlled manner, so that the film really melts and connects to the two metallic surfaces. This is not without its problems and will be assessed negatively later on in the usability. In the meantime, good and precisely applied pastes are hardly worse, so that the meaning of these pads has almost dissolved into nothingness. We also see that the distance between the pastes is very small if you only put them thin enough and the contact pressure is also correct. Let's first take a look at the systems used for measurements with the CPUs, which for many reasons have not changed over the years. On the one hand, a plausibility test has shown that, on the one hand, the measured distances between the individual pastes do not change or only marginally change on the latest hardware, and on the other hand, the sensors of the older CPUs provide significantly more accurate values than the DTS of the current CPUs. Since the DTS of the CPUs provide rather hypothetical results for the core temperatures Tcore, we use, as already mentioned, the good old evaluation of Tcase on the thermal diode under the heat spreader. Since all CPUs used for the test still have soldered heat spreaders, this method is probably the closest thing to the whole thing. We can therefore measure the exact temperature below the heat spreader, which is extremely important and indispensable for an objective evaluation. Using Tcase instead of Tcore is always the more accurate solution. What always excites us is the long-term durability of all used comnpons, even if we have of course stored both CPUs, as well as the graphics card and the motherboard twice in the archive in case of cases. the only thing that really needed to be replaced was the power supply after three years. In the case of CPUs, we rely exclusively on the difference value (delta) from room temperature and tcase, as despite countermeasures in the room there were always slight deviations and these could distort the result for Tcase a little bit.

Test 1 – Compact water cooler  
Cooler used Corsair H80i Compact Water Cooling
Fan Original fan of the H80i, powered by 7 volts unregulated.
Cpu AMD FX 8350
Motherboard Asus 990FX Sabertooth

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About the author

Igor Wallossek

Editor-in-chief and name-giver of igor'sLAB as the content successor of Tom's Hardware Germany, whose license was returned in June 2019 in order to better meet the qualitative demands of web content and challenges of new media such as YouTube with its own channel.

Computer nerd since 1983, audio freak since 1979 and pretty much open to anything with a plug or battery for over 50 years.

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