3 ms·

Cycles of heating and cooling are what increases failure rates. The thermal expansion and contraction causes issues.

• ssl-3 4mo ago
  That's one way to put it. Another way is that my great grandchildren won't care about inheriting my collection of hobbyist SBCs, and therefore nor should I.
• rjzzleep 4mo ago
  Permanent heat doesn't?
  • magicalhippo 4mo ago
    From what I've gathered, heat absolutely does[1] affect[2] it[3]: Subsequently, in 1967, Black of Motorola experimentally derived a median time to failure (MTTF, i.e., operational lifetime) model for EM in Al interconnects, showing that the time to failure due to EM is inversely proportional to both the current density and the absolute temperature of the interconnect. [1]: https://infinitalab.com/blog/ic-failure-analysis-defect-types/#Common_IC_Failure_Mechanisms https://infinitalab.com/blog/ic-failure-analysis-defect-type... [2]: https://resources.system-analysis.cadence.com/blog/msa2020-blacks-equation-for-mttf-due-to-electromigration https://resources.system-analysis.cadence.com/blog/msa2020-b... [3]: https://www.mdpi.com/2079-9292/14/15/3151#sec3-electronics-14-03151 https://www.mdpi.com/2079-9292/14/15/3151#sec3-electronics-1...
  • numpad0 4mo ago
    Thermal cycles, heat, current, all contribute to degradations and failures. It just so happens that cycling is the worst and everyone knows "it's the power cycles that kills computers". Doesn't mean at all that electronics can't be damaged countless other ways.