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#72
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Can you guarantee that one will mount every CPU properly? I
too would recommend hobbyists use thermal compound. The stuff is so cheap. So many computer assemblers make mistakes. Best to just tell them to always use thermal compound. However CPU manufacturers have provided some CPU heatsink assemblies without thermal compound when customer assembly was not required. Too many computer assemblers completely avoid numbers such as the essential "degree C per watt" parameter. Better to tell them to install thermal compound to help compensate for a poorly surfaced or not even machined heatsinks. To compensate for heatsinks erroneously selected on hype, price, or a useless parameter such as CFM. Just because cheap thermal compound is used does not prove that thermal compound is required. Furthermore, a recent Intel paper demonstrated little difference between thermal compound and bare 'heatsink to CPU' for high power semiconductors. In that same paper, Intel also demonstrated advantages of phase change material. But those numbers are beyond the scope of where this discussion has proceeded. This discussion demonstrates how to experiment - to learn heatsink interface quality by running without and then without thermal compound. This discussion debunks myths about thermal compound being 'essential' by providing both underlying theory and experimental examples. This discussion demonstrates why specifications are so important in thermal analysis and which specifications are important. A "degree C per watt" specification is more important than thermal compound. Specifications associated with that "degree C per watt" parameter demonstrate pros and cons of thermal pads, thermal compound, and heatsink quality. Nothing from Intel or AMD 'instructions for assemblers' proves that thermal compound is essential. If thermal compound was essential, then one would have easily provided those numbers days ago. larrymoencurly wrote: If thermal compound doesn't matter much, why do all CPU manufacturers include something like it with their retail boxed CPUs and heatsinks? The retail boxed AMD XP1800+ I bought last month cmae with a layer of phase change material on its heatsink, and my old 300 MHz Slot 1 Intel Celeron heatsink, which was installed at the factory, had grey grease on it. Both heatsinks were fairly flat, although I didn't measure this. |
#73
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Without specifications, that post is just another junk
science proclamation. But then too many use such junk science logic which also makes Arctic Silver so profitable for its manufacturer. Strontium wrote: Tom's an idiot. Any more questions? |
#74
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w_tom wrote in message ...
If thermal compound doesn't matter much, why do all CPU manufacturers include something like it with their retail boxed CPUs and heatsinks? my old 300 MHz Slot 1 Intel Celeron heatsink, which was installed at the factory, had grey grease on it. [Heatsink was] fairly flat, although I didn't measure this. Can you guarantee that one will mount every CPU properly? I too would recommend hobbyists use thermal compound. The stuff is so cheap. So many computer assemblers make mistakes. I don't think that it's even possible to mount a Pentium4 heatsink improperly because of the widely-spaced supports, and with an Athlon improper mounting either causes the center part to be cracked or the CPU to burn up right away because of a big gap with the heatsink. But what about the example I mentioned previously, where the Slot 1 Celeron came with a factory-installed heatsink with thermal compound on it? |
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