Re: The Hall of Shame - Badcaps Photo Montage
The OSTs likely popped because the fan seized. That being said, OSTs would probably outgas anyway, eventually, whether they deform the can or not. As you recently observed, lots of bad capacitors, including Teapos and OSTs, likely went bad without showing it because they outgassed too slowly to violently die, but when the liquid electrolyte turns to hydrogen gas and dries up, ESR often goes through the roof.
The pictured failure is a small form factor machine as evidenced by the type of fan used. Yours is a regular size desktop - that's likely why. Different motherboards. And those KZGs appear to have 2005 datecodes - frankly, I'm surprised they even lasted 10 years in a small form factor machine, even in storage.
If anything kills KZGs faster than storage time, it's heat. They seem to pop very quickly when overheated even mildly. I have an arduous time believing they (KZGs/KZJs) survived the 2,000 hour @ 105*C torture test - they seem to outgas under less thermal duress. Aqueous capacitors are more likely to bulge in storage because the bias applied to the plates also plays a part in inhibiting the corrosion-based failures, not just the oxidizers and neutralizers present in a good electrolytic solution.
Originally posted by momaka
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Interesting how Dell (or rather Foxconn?) used good polymer caps on some of these (like the one I have in my 170L) and KZG in others.
Speaking of KZG, I had one 820 uF 6.3V KZG fail on a P5GC-MX while sitting unused in storage for a year. This was back in October. Yesterday, I had a look at that motherboard again, and another 820 uF 6.3V KZG has failed again, all on its own. I guess it is only a matter of time before others bulge on that motherboard. It's had something like 50k hours on the clock, though. So not too bad overall. I guess KZG doesn't like to sit unused more than anything else.
nVidia RTX 3080 TI, Corsair RM750I.
Half of the computer problems is caused by bad contacts 
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