Re: combining 2 power supplies

crazy frog wrote:
green wire to black ground starts them up, but put
a load on them first like youre drives.
only the motherboard needs power good.
if running with no load, use a 5watt 100ohm resistor
accross the 5v+ to black ground for a dummy load.

Lets do a bit of maths.

5 V across 100 Ohms is 5^2 / 100 = 25 / 100 = 0.25 W. So you would only need 1/4 W restor, not a 5 W one.

However, like someone else, i think that would be totally inadequate as a minimum load.




"lee" <newsgroup@xxxxxxxxx> wrote in message news:44263f11$1@xxxxxxxxxxxx

Hi,

Over the years, I've kept a few ATX power supply from old computers. Now,
I'm thinking about upgrading my computer and add more hard disks. The
problem is the current power supply might not be able to support so many
hard disks running at the same time. Instead of buying a new, more

powerful

power supply, I am planning to use one old piece (350w) to serve the
motherboard, CD, and 3 hard disks, then another power supply (350w too) to
serve 3 to 4 more hard disks. All components are connected to the same
motherboard. I need to know how I could turn on both power supply with a
single press of the power button on the case.

In other words, only one power supply can plug to the motherboard, how can

I

jam the wires together so that the second power supply receive the

power-on

signal when I press the button? I was thinking about the Power-On

(Green),

Power-Good (Gray) and 5 VSB (Purple) wires. the second power supply would
only support the hard disks and nothing else, but I need them to be

powered

up at the same time other hardware are up (and down when it's shut down).

Thanks.







--
Dave K MCSE.

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