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Old 28-11-2007, 10:31 PM   #25
Arthur Hagen
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Re: Need HW advice for new PC - Which CPU

Daniel James <wastebasket@nospam.aaisp.org> wrote:
> In article news:<fihj1i$6u6$1@tree.broomstick.com>, Arthur Hagen
> wrote:
>
> So ... how much overcapacity would YOU allow on each rail, when
> spec'ing a PSU?


If having to state a rule of thumb, I'd say at least 50% extra.
It depends on what you run on each rail too -- it might be prudent to have a
higher safety margin for the rails that provide bus power or power a high
end graphics card -- a voltage drop due to a temporary peak draw can be more
critical there (and much harder to troubleshoot as a PSU problem).

I'm going to have to replace the PSU on this box pretty soon, because with
everything I've added over time, the +5VSB (standby power) doesn't deliver
enough juice, meaning I can no longer start the system after shutting it
down unless it's been powered all the way down with the hard switch on the
PSU.

Regards,
--
*Art

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