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I have connected (temporarely) my old 200W AT PSU in my computer to power everything except mobo and everything is powering up normally, i have some questions!

My power ok (AT PSU) isn't connected to anything, to what i connect it?
12V 5V ground??

I want to put a relay on the switch of the at power supply so the ATX PSU will start it automatically, how much amps goes in that switch? i want to get a relay big enouph!

BTW i have a common ground and my second PSU in in my 2 upper CD drive bay, yes it fit... tight but it fit! Looks kind of weird!

THX all!!! :oops:

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Last Post by caperjack
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My power ok (AT PSU) isn't connected to anything, to what do I connect it?

Don't worry. That's a "feedback" connection -- you have no use for it.

I want to put a relay on the switch of the AT power supply so the ATX PSU will start it automatically, how much amps goes in that switch? i want to get a relay big enough!

6 amps should be enough, but 10-amp relays are still relatively cheap.

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fIRST ANSWER, FIRST GOOD INFORMATION, I LOVE YOU MAN!

thX!!!!!

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I am curious is the reason for using two power supplies to get enough
power to supply the motherboard seperately? Using the second one to supply the all the other things that are normally connected to the primary power supply?
This may not work due to grounds being connected by the various hookup cables to the motherboard. I would personaly not recommend doing this.
As for the relay ATX supplies can be turned on with the mouse or keyboard through the setup in Bios. As for the AT supply it can be turned on by the power switch that is normally mounted on the front of the case.
I reserve the right to be wrong, these are my thoughts, HTH. ;)

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