Seasonic 1000w plat motherboard cable

[Seezer]

I just picked this psu up and I'm a little confused on something. The motherboard cable has one end that is 24 pins that goes to the mobo, and then on the other end it's an 18 pin plus a 10 pin connector splicing from that. My question is why is there 28 pins on the psu side and only 24 pins on mobo side. And also, the spliced end is so tight that it's hard to even connect the 10 pin to the connector below that one.

[Butler to Baby Sloths]

Probably just grounding pins on the PSU end of the ATX 24pin power cable.

[Seezer]

so is it common for there only to be 18 pins on the PSU side and 24 on the motherboard side? I would assume they would have to be both 24 pins.

[Sweetleader]

You sure it isn't an 18+6pin on the PSU side. I have a Seasonic 860w Plat that is basically identical to the 1000W and that's what it has. I beleive my 1250W Gold is the same but I don't have it available to verify.

[Deleted]

It should have the following connectors:

[chazus]

It is an 18+10 pinout. It's a proprietary Seasonic thing with the higher end PSU's. I've noticed some people having trouble contacting seasonic as to why, because it looks like it doesn't provide any more stable rails or anything.

To be clear, an upper cable is two rows of nine, a low cable is two rows of five, and these merge into the 24 pin that plug into the motherboard.

You can see it here

[Seezer]

It is an 18+10 pinout. It's a proprietary Seasonic thing with the higher end PSU's. I've noticed some people having trouble contacting seasonic as to why, because it looks like it doesn't provide any more stable rails or anything.

To be clear, an upper cable is two rows of nine, a low cable is two rows of five, and these merge into the 24 pin that plug into the motherboard.

You can see it here

So do I have to plug the 10 pin in as well? Where it splits is very short and I can't seem to plug it in to the PSU.

[Deleted]

So do I have to plug the 10 pin in as well? Where it splits is very short and I can't seem to plug it in to the PSU.

Yea, you need to plug it in, it sounds like when they sleeved the cable they failed to line them up right. you should be able to slide the sleeve enough to re position the cable and allow you to plug it in.

[chazus]

You definitely need to plug it in. What is holding it exactly? The end of the sleeve? It looks like (from other pictures of the cable) you can just bend the wires a bit to fit in the proper way.

[Seezer]

You definitely need to plug it in. What is holding it exactly? The end of the sleeve? It looks like (from other pictures of the cable) you can just bend the wires a bit to fit in the proper way.

I finally got it to fit, but it was tough bending those wires around to fit it. God knows why they didn't split them vertically instead of horizontally.

[Deleted]

Hi, I have the exact same problem but can't find out how to plug the 18 + 10 psu cable. Could you give me some more details please ?
Thanks

[Arbiter]

The image chazus linked, Where it says Mobo twice, the 18 pin plugs into the top mobo spot, and the 10pin plugs in to the mobo spot below it.

The 8pin CPU spot next to that one is for the 8pin CPU slot of course.
The top right slot for PCI/CPU, I haven't quite figured out which its for. I haven't needed it so avoided. Maybe for the enthusiast grade motherboards?

Got the same PSU and it works for me the way I explained. It's a tough fit for the mobo pins, but it does fit. No idea why it's done that way but whatever. Amazing PSU regardless.

EDIT: Also just realized this is an old post. Next time just make a new post if you have a question instead of Necroing old posts. Avoids confusion and wasted time answering old questions.

[Deleted]

Yes, thanks, I did as Chazus explained, looking at his picture.
The 24 pin connector goes on the motherboard
The 18 pin connector goes on the top left part (2 lines of 9 pins) ( with the M/B letters)
THe 10 pin connector goes just below it (2 lines of 5 pins ) (as well with the M/B letters)

As Seezer said, indeed, it's weird they didn't split them vertically instead of horizontally.

I have posted a reply here in order to be sure the ones who have faced this problem could answer me, sorry.
Thanks for your help.