ATX Power Connector Footprint: 20, 24, 4 Pins | Guide

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To use ATX power connectors for devices, it's essential to understand the different connector footprints, such as 20-pin, 24-pin, and 4-pin configurations. The dimensions can be found in PC98 specifications, and it's crucial to check the power supply's datasheet for minimum output current requirements to ensure proper regulation. Without meeting these minimum loads, the power supply may not function correctly, especially in a lab setting. Connecting the PS_ON# pin to ground can activate the power supply, but testing output voltage is necessary for verification. Overall, careful consideration of specifications and load requirements is vital for effective use of ATX power supplies.
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I want to use atx power from my pc as the source for my devices. How can i decide the footprint of the connectors, e.g. those with 20pins, 24pins, 4pins, ... Maybe i can goooogle them out using their formal names, but, :confused: what are they?
 
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get the dimensions from the pc98 specs.
 
Also, keep in mind that PC power supplies generally have a minimum output current on one or more rails in order to stay in regulation. You generally won't be able to use them as a lab bench supply, unless you are careful to ballast up the outputs to their minimum output current when there is no other load. Just check the datasheet for the power supply you are considering, and look for the "minimum output load current" specification.
 
Thank you. I've got the definition :)

Concerning the minimum output current required, I once connected PS_ON# to ground as the connector was floating, and the fan did run. But I didn't test the output voltage, so I don't know if the power was working properly then. And it seems the manufacturers haven't provided detailed specification. What a pity if they can't be utilized in lab:(
 

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