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Optiplex cpu power connector (Which 4 pin)

lightfire
By lightfire
in Power Supplies
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Posted

Hello, 

I'm doing an optiplex build and am currently replacing the power supply. The motherboard only has a 4-pin cpu connector, however my psu has an 8 pin (2x4 pin). Does it matter which 4 pin I use?

 

Also, the sata power cables are currently connected to the motherboard. Would it cause a problem if I connected them directly to the power supply?

Thanks so much in advance!

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Nope, the 8 pin is just two 4 pins stuck together.  You should be able to snap it apart and use one half of it.

 

Sata data cable should be connected to the motherboard, not power.  Do you have a pic maybe?

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1 minute ago, TheGlenlivet said:

Sata data cable should be connected to the motherboard, not power.  Do you have a pic maybe?

You never know... it’s an OEM board ?

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Just now, GrockleTD said:

You never know... it’s an OEM board ?

Yeah as I was typing I thought that too, A pic would help a lot.  Or maybe the model number.

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6 minutes ago, TheGlenlivet said:

Nope, the 8 pin is just two 4 pins stuck together.  You should be able to snap it apart and use one half of it.

 

Sata data cable should be connected to the motherboard, not power.  Do you have a pic maybe?

Yep, but does it matter what 4-pin I plug in?

And yes, sata data are also connected to the motherboard, but so is sata power at the moment. So I was wondering if I could connect those sata-power to the psu directly so I can get rid of those ugly cables. Sata data cables have to stay connected to the mobo of course. It is an optiplex 9020 MT ATX. Here are some pics:

IMG_3785.JPG

IMG_3786 2.JPG

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Ah ha, so it is Sata power from the MOBO.  

You should be able to use the sata power from your PSU instead and unplug those cables from teh motherboard.  Unless there is some weird Dell Proprietary requirement to have them plugged in.

 

Edit - power from the motherboard not CPU.

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2 minutes ago, TheGlenlivet said:

Ah ha, so it is Sata power from the CPU.  

You should be able to use the sata power from your PSU instead and unplug those cables from teh motherboard.  Unless there is some weird Dell Proprietary requirement to have them plugged in.

I see, okay! Well, if it doesn't work, at least I might have an idea why ;) Thanks

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25 minutes ago, lightfire said:

Yep, but does it matter what 4-pin I plug in?

Yes it does, only one end should go in, unless you ram it in with brute force.

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8 minutes ago, Ralf said:

Yes it does, only one end should go in, unless you ram it in with brute force.

Accually both go in perfectly fine. The left four (on my and on your picture) have 2 pins with 90 degree corners (which line up with the port on the motherboard, but the right 4 pins have all round corners on my connector (so also fits).

IMG_3787.thumb.jpg.8d00d6e5f859d95049f1729c65ec6c4d.jpg

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