You ought to read the specifications for the ATX powersupply by Intel.

Not only are there specific design rules you have to follow, you also
have to limit the failure modes so that it fails safe (no damage to the
computer) and makes no noise or noticable smoke when it does fail.

Sadly, these are specifications, and not regulations.

There was a recent article on powersupplies by one of the tech hardware
websites that tested 10-15 powersupplies to their rated limits.  IIRC,
only two supplies actually supplied the full 300W or 400W that they were
rated to, all others failed with only a percentage of the rated load,
some rather spectacularily.

-Adam

Alan Gorham wrote:

>I agree with what you say about the data back-up process, but do all PC users
>*really* have to always be ready for exploding power supplies?
>
>Alan
>
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