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機箱散熱夠好, 只打機, 或睇下youtube, 原裝散熱可能夠用, 唔會80幾度.

長時間80幾度就唔係幾好.



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ryzen3000出了後, 忽然80度又不熱了.


It has proven by data that in semiconductor and electronic parts, failure rate hugely increases depending upon heat and life shortens.





http://www.apiste-global.com/enc/technology_enc/detail/id=1262


Electromigration decreases the reliability of chips (integrated circuits (ICs)). It can cause the eventual loss of connections or failure of a circuit.
高溫會加速電遷移.



引用:
原帖由 hamsterman 於 2019-8-17 08:24 AM 發表

Chips are typically designed for EM for the expected lifecycle of the product to minimize field failure. 80C is well within design specs, which typically guarantees normal operation between around ...
AMD CPU 3年limited warranty. 3年後壞, 都可以叫 within spec, design.



引用:
原帖由 hamsterman 於 2019-8-17 06:34 PM 發表

In order to warrant 3 years of normal operation the chip must have been designed to work well past 3 years. You never target your design to the mean of the expected distribution. Chip designers ar ...
我的火牛就係設計成十年保養.
哩啲先係 well past 三年設計.
不過, 火牛講明不應在80度工作.



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引用:
原帖由 hamsterman 於 2019-8-17 10:41 PM 發表

You are comparing apples and oranges. Power supply wires are so thick compared to ICs that they don’t have EM issues. Chip design does not have  unlimited resources.To guard against potentia ...
power supply 都有IC, 電路板, 電容. 全部都受高溫影響.
power supply 80度隨時都仲可以運作一段時間, 不過不是十年吧.



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原帖由 hamsterman 於 2019-8-18 12:58 AM 發表

I’m neither for nor against AMD, I actually worked for them a while back. I work in the chip design industry and many of my colleagues are present or ex AMDers.
師兄是有份設計ryzen cpu?
以你的專業見識, 新ryzen3000 的 RDRAND 指令bug是不是冇得用AGESA修理? 要等respin所以咁耐都未修好 RDRAND BUG?



引用:
原帖由 hamsterman 於 2019-8-18 04:39 AM 發表



Nope, I was completely not involved. My time with AMD was ancient history. I also don’t follow news on whatever bugs they’re having. However, I would say that as a general rule, chip m ...
多謝師兄專業解釋.
似乎, 等一個stepping先買比較理想. 不過唔知等到幾時.



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