"JB" <highlinex@yahoo.com> wrote in message
news:ffppu502pkr@enews4.newsguy.com...
> It seems like both industries operate in a vacuum.
>
> I looked at a video card whose requirement was "a 350 W PS with 22 A
> available on the +12V rail".
>
> Most PS ratings that I checked are rated for a maximum of around 18A on
> the +12V rail regardless of the advertised power rating.
>
> Some have dual or triple +12V rails whose combined ratings may be 36A or
> higher.
>
> So how do we make a determination as to what the video card really needs
> and how to provide it?
>
> Some would, I suppose, put the rails in parallel and hope for the best.
> But if the PS is not designed for that mode, the result could be
> instability with unpredictable effects.
>
> If the actual load requirement for the video card were disclosed, we could
> make some guestimates as to all other loads and choose a power supply that
> would probably work. IMO the video card requirement is ridiculous and
> shows a lack of concern for the customer.
>
> Thanks for any insights.
>
> Mike


http://www.overclock.net/faqs/88626-...tiple-12v.html

Luck;
Ken