From Gary...
they provided replacement fans that were marginally quieter but pushed the system closer to the edge of the safe operating temp range, every self-proclaimed genius replaced the fans with quieter ones without knowing a damn thing about thermal dynamics, PSU's started failing and finally somebody said "hey guys, this is not worth it"
As always... spot on Gary. Most people that replace the fans in the PSU do not research the extremely high CFM values of the original fans and yes... they kill their PSU from heat. There is a fine line between "Quieter" and "Hotter"
As we have seen, there are some extreme Mods that lower both temperatures and noise, but they require time, tools, effort, and skill
I recommend a few easy tips for newbiews...
1) Replace all mechanical hard drives with SSDs (targets both noise and excess heat)
2) Have a FW400 device plugged in (automatically throttles down the internal fans) as some have mentioned
3) For single CPU configurations, replace the main 120MM fan with a silentX, very easy MOD, close CFM values