8 Pin ATXV12 next to CPU (and no boot issue)

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chokusenbanchou

Honorable
Oct 13, 2013
5
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10,510
PSU Seasonic 520W S12II
Motherboard Gigabyte 990FXA-UD3

So I wired up most of my parts but my motherboard came with this 8 pin cable. (Looks like http://www.playtool.com/pages/psuconnectors/connectors.html#eps8)

I did manage to find an 8-pin connector from the PSU but I don't know if that's where it goes or not. Bear with me here, I have never actually build a PC before.
 
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Pinhedd

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Aug 7, 2007
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Hi there,

That slot is not an 8 pin ATX12v connector but actually an 8 pin EPS connector. The 4 pin version is part of the ATX standard.

Fortunately, the EPS and ATX12v standards have a lot of interoperability.

An ATX12v compliant PSU will have a 4 pin ATX12v auxiliary connector. This can be plugged into a motherboard with an 8 pin EPS connector. 4 pins will be left unconnected, but this is normal.

On the other side, an EPS compliant PSU will have an 8 pin EPS auxiliary connector which can often be split into two so that it can connect to a motherboard that features only a 4 pin ATX12v auxiliary port.

Fortunately for you, your PSU is EPS compliant and should have an 8 pin EPS connector. Unfortunately for you this connector has the same physical dimensions as the 8 pin PCIe connector, but with different keying so that they cannot be plugged into each other.

Root around in the mess of cables coming from your PSU until you find an 8 pin cable that is labelled "CPU".

EDIT: Some PSUs have both an 8 pin EPS auxiliary connector and a 4 pin ATX12v auxiliary connector. If your motherboard takes 8, give it 8. If it takes 4, give it 4.
 
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chokusenbanchou

Honorable
Oct 13, 2013
5
0
10,510


The only thing about my PSU is that the cables themselves aren't labeled. I'll try and get a picture of my motherboard actually in my case...

I've been thinking that my mobo was DOA and I never wanted to accept it. I'm pretty sure I bent something just trying to get the goddamned thing into the case in the first place, and one of the standoffs isn't in straight. I really should have just asked a professional to build this rig for me...
 
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