Thanks for the illustration.
Hmm, your cable looks more like a EPS-12V instead of an 8-pin, more than that, it looks like it might be proprietary. Is the picture and the diagram you drew of the connection that goes into the PSU itself? How is the other end keyed as well, could you take a picture? Also, can you take a picture of the connection on the PSU where the cable goes?
Here's my source:
Image
EDIT:
This may be bad news, if you refer to
this thread, in the second post, ignoranceabound states the following:
The only real modular cables are from Ultra; the other "modular" PSUs use their own proprietary cables that are usually specific for that PSU or brand.
Did you buy the PSU separate or did it come with the build? Do you know if it's still under warranty? You
might be able to contact Antec directly to get another cable. And if you can't/don't want to do that, you could try the adapter I mentioned as a workaround instead of having to get another PSU.
The following statement from
this forum further indicates that the cable is proprietary.
Unfortunately, all modular cables for our units are proprietary to the unit they are made for. Due to differing amperage and pin orientation on each model, cables from a different model will not work.
If it is proprietary, your options are the following:
• You could possibly contact Antec to see if they can get you a replacement cable.
• Try finding the cable on Ebay or similar. (I can help you search.)
• You can try the adapter I linked, a local computer shop may have the same cable if you want to look.
• You can get another PSU.
Other than that, I'm pretty much out of ideas.