ATX Power Supply Help!

i have this power supply. is it an atx supply? because i want to turn it into a bench top power supply but i can only use an atx. it has a 20 pin connector. i heard that if its not an atx, it wont work for some of the ibles on here. thanks.

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Hi, I put 330ohm resistor and LED between green and black wire and put switch between gray and black wire to be able to switch the power supply from it's front side. I didn't put the LED between gray and black since it's current is too low for the LED. Is it ok or green and black should by directly shorted (without any additional resistance)? I don't have exactly +12, -12, +5, -5 but something like +11,1, -10,9, +5.11, -4.2 Is this ok or there is probably something wrong with my power supply / connection? Thanks guys.
I Forgot to mention that I put 10ohm 20W resistor between red and black wire as well.
whatsisface9 years ago
That's not an answer to my question...
you need to connect them for the entire time you want the supply on in the computer there is a circuit that switches it on of orr on demand. when the comp is on the circuit holds the green connected to black all the time. the circuit reacts to many things like the button / software asking to shut down the computer / wake on LAN (turn on by request from network) etc. those signals are all momentary
. So /PS_ON and /PSON are not the same thing? I thought it was a typo.
i think they are the same
Ah now I see. Thanks.
whatsisface9 years ago
Then how come the power button on a PC is momentary?
tech-king9 years ago
because its only supposed to be momentary. add a momentary switch if you want a switch.
. hmmmm The chart at says:
14  /PS_ON  Green  Power Supply On (active low). Short this pin to GND to switch power supply ON, disconnect from GND to switch OFF.
but then there is a note at the bottom that says:
/PSON activated by pressing and releasing the power button while the power supply is in standby mode. Activating /PSON connects the power supply
. I'm confused
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