Quote: Of course, that doesn't stop some manufacturers from using cheap or even fake components in order to make it fail by design 6 months after the warranty expires (planned obsolescence).
There have been numerous modern power supplies made which are designed for powering nothing more than a Pentium 2, yet they throw on the 4-pin 12V connector and SATA power connectors and sell it as the latest and greatest, and in real world use it fails within a year because it can't handle anything more than a few amps on the 12V rail and blows up while the 5V rail, with its 30+ amps rating, sits there doing almost nothing as the 5V-heavy CPU vanished after the Pentium 3!
That is why I purchased my Dell computer directly from the Dell.com website instead of a third party. By purchasing directly from Dell, it protects me from the shadiness you've mentioned. (I hope)