The 'deterioration' of components is far slower than you imagine.
A good quality PSU should last 50+ years assuming that it runs at reasonable temperatures and humidity levels.
A cheap quality PSU is a completely different matter.
Not 50 years.
17 hours ago, Enderman said:
Capacitors, resistors, transformers, etc. are designed with hundreds of thousands or sometimes millions of hours of MTBF.
As long as the PSU is high quality and is designed properly without overdriving components, the PSU will last many decades.
Many electronics that were designed properly from the 60s and 70s still work perfectly fine because they were designed without cutting corners and following the spec.
Not millions of hours.
Also look up what "MTBF" actually is. It's not the definition of the life of a product.
Also, PSUs have become overly complicated over the years due to efficiency and safety requirements. Quite different than the 60's and 70's. And consumer grade product DO cut corners. Period. You're not paying for an industrial or military grade product when you spend $100 on a 750W PSU.
16 hours ago, Enderman said:
The AX750 wasn't great, I had an AX860i that died and killed a bunch of parts.
I only use seasonic PSUs now.
AX750 IS Seasonic. AX860i is Flextronics, which is a much higher tier than Seasonic. But there's no such thing as 0% failure, even in the best made products.
16 hours ago, Scania556 said:
Sorry, I'm really confused.
I still don't know if it is safe to use the PSU with 12-year warranty after 10 years. (The PSU was bought at the end of 2020)
I wouldn't. Warranty is marketing. They use prior RMA history to determine how many people actually exercise their warranty (find the ratio of sales to returns, essentially) and then amortize the cost of doing business for the percentage of people that do RMA's and factor that cost into the profit and determine how long they can support that warranty without losing money.
I would say if it's a good quality PSU, it should last 10 years. What I use as a rule of thumb is the fan dying. If the fan dies, the PSUs is not going to last much longer so that's your cue to replace it.