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More than 1 type of ATX power supply pin out?

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December 14, 2009 1:00:08 PM

Is there more than 1 ATX power supply pin out? The reason I ask is because I built some ASUS P4B motherboard based systems a couple years back and put 350 watt ATX power supplies into them at the time. I had reason to upgrade the PS to 500 watt units and bought some that said that they were ATX power supplies - but they don't fit. The plug that goes to the mother board is slightly larger and has an extra pair of pins on it. What power supply should I have gotten?
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Richard Lewis Haggard
a b B Homebuilt system
a c 243 ) Power supply
a b V Motherboard
December 14, 2009 1:09:46 PM

Not really more than 1 type of pinout , just different versions of the ATX spec.
Your P4B only requires a 20 pin main connector, many modern power supplies come with a 20+4 pin connector to be able to accomodate the older ATX specs.
As long as there's clearance on the board you can use the 24 pin without fear.
Here's a link that may help;
http://www.playtool.com/pages/psuconnectors/connectors....
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December 14, 2009 1:41:41 PM

So you think I have a new ATX power supply that has 4 more pins than are on the older ASUS P4B motherboard and that it should be possible to use the power supply anyway? As soon as I saw that the motherboard power connector had fewer pins than the power supply, I did not attempt to make the connection. In the brief amount of time I spent in disbelief before engaging in a meltdown, it looked to me like they were slightly different sizes as well. I will go back and look closer.

Or maybe there is a cable adapter that will do the trick?
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Richard Lewis Haggard


delluser1 said:
Not really more than 1 type of pinout , just different versions of the ATX spec.
Your P4B only requires a 20 pin main connector, many modern power supplies come with a 20+4 pin connector to be able to accomodate the older ATX specs.
As long as there's clearance on the board you can use the 24 pin without fear.
Here's a link that may help;
http://www.playtool.com/pages/psuconnectors/connectors....

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a b B Homebuilt system
December 14, 2009 6:36:33 PM

Yeah, like he said it's only worth using one of those if the extra 4 pins have no room to just sit there.
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a b ) Power supply
a b V Motherboard
December 14, 2009 6:51:04 PM

It's also possible to use the 20 pin power connector from an older PSU on a MB with a 24 pin connector. I wouldn't recommend doing so though on a high powered computer which should have a larger supply to begin with.
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December 20, 2009 11:00:21 PM

Thanks. It turns out that I got lucky on this. The new power supply has 24 pin socket, 4 of which are removable so it will fit the MB without significant trouble.

Thanks guys!
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!