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How do I know if a power supply has a 20 or 24 pin connector?

Last response: in Motherboards
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January 9, 2014 3:19:50 PM

So I bought a brand new Corsair power supply for my new HP Computer. But the PS has a 20 pin connector; the motherboard a 24 pin.

I went back to the online store I got the power supply from and there is no mention about it being a 20 pin connector. So how do people know?

I'm kind of peeved about this, since I got a good deal on the PS.

I hear you can connect the 20 pin anyway, but I'm wondering if I should do this or just use the original cheapie 300W PS (with 24 pin connector) that came with the PC? I have one video card in the PCI slot. Everything else is onboard.

Thanks.
a c 2181 ) Power supply
a b α HP
a c 1223 V Motherboard
January 9, 2014 3:24:47 PM

What PSU EXACTLY?
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January 9, 2014 3:27:23 PM

It's a Corsair CX430M. I generally don't like using the power supplies that come with PC's, but in this case I might.
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a c 2181 ) Power supply
a b α HP
a c 1223 V Motherboard
January 9, 2014 3:28:48 PM

The CX430M has a 24 pin.

Connectors
1 x 24pin main connector
1 x 8pin EPS12V CPU
1 x PCI-E
2 x SATA
3 x Peripheral
1 x Floppy

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January 9, 2014 3:31:53 PM

Well mine does not. It's only 20. Very interesting to see that image above. Mine looks just like that but the connector has 20 pins. (Ten on each side)
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a b ) Power supply
a c 85 V Motherboard
January 9, 2014 3:32:12 PM

I've found conflicting specs on that PSU. Some sites list it as having a 20+4 connector. Have you checked to see if there are four pins that can be disconnected?
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January 9, 2014 3:34:39 PM

Ha, well I bought it from Best Buy.
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a b ) Power supply
a c 85 V Motherboard
January 9, 2014 3:34:58 PM

I just looked at the close-up picture on Newegg and it does look like a 20+4 pin connector. In that case just connect the extra four pins and you should be good to go.
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a c 2181 ) Power supply
a b α HP
a c 1223 V Motherboard
January 9, 2014 3:40:21 PM

Your 430M supply SHOULD have the 20+4 PIN SETUP.
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January 9, 2014 3:42:47 PM

Oh crap. It does have 24 pins. What an idiot I am. It has the extra 4 pins separate (detached) from the rest...I thought that cable was the one that plugged into the other CPU area of the MB. I only saw two connectors, the third (for CPU) was buried.

But this leads me to another question. The CPU connector (forgive me if that's not the name) on the original PS is 4 connectors. The Corsair is 8. Is that ok?
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a c 2181 ) Power supply
a b α HP
a c 1223 V Motherboard
January 9, 2014 3:44:51 PM

Yes that is 20+4 , plug in both your good to go.
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a c 2181 ) Power supply
a b α HP
a c 1223 V Motherboard
January 9, 2014 3:47:55 PM

Yes.
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January 9, 2014 3:47:58 PM

What I mean to say, above, is the MB has a 4 pin CPU connector. The Corsair PS has 8. Do I need an adapter?
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January 9, 2014 3:49:57 PM

Just tried the 8 pin in the 4 pin. It fits fine, but does it matter which way it goes?
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January 9, 2014 3:54:58 PM

Ha, and to think I used to build PC's. (12 years ago). Thanks for all your help, guys!
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a c 2181 ) Power supply
a b α HP
a c 1223 V Motherboard
January 9, 2014 3:56:24 PM

No problem glad to assist.
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!