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Thread: PSU Extension cables and AWG?

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    Default PSU Extension cables and AWG?

    I'm seeing some extension cables using 18AWG and some using16AWG, while I contacted Corsair about their extension cables, through Amazon, and IO got this back: ""Hello, That's not a parameter by which we sell these. Do you have compatibility questions? If you have any other questions, please reach out: support.corsair.com""

    So how much is enough for 500 through 1000 wt PSUs?

    Thanks.

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    Quote Originally Posted by DWD1961 View Post
    I contacted Corsair about their extension cables
    Corsair does not make/sell extension cables.

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    Quote Originally Posted by Jon Gerow View Post
    Corsair does not make/sell extension cables.
    My mistake! They sell the entire cable. However, the question still stands. What AWG should I be looking for for extension cables?

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    16g.

    You never want to REDUCE wire gauge when extending a cable. The extension is already creating enough resistance, as does the additional connector. So reducing the gauge will increase resistance even more.

    That said: I do not suggest extensions.

    Question: Why do you need extensions? Do you have a mammoth case like a 1000D?

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    Quote Originally Posted by Jon Gerow View Post
    16g.

    You never want to REDUCE wire gauge when extending a cable. The extension is already creating enough resistance, as does the additional connector. So reducing the gauge will increase resistance even more.

    That said: I do not suggest extensions.

    Question: Why do you need extensions? Do you have a mammoth case like a 1000D?
    HA! No way. My huge case days are over.

    I'm actually building in the beautiful Corsair 280 Crystal ITX/mATX case using an ITX board. As you know, that case is a wall of glass, so my need for WHITE power cables is/was purely aesthetic. I was close to getting the Corsair white power supply too, but since you don't even see it in that case, I don't really care what color the PSU is.

    At only 10" extensions, would resistance be an issue?

    I just found some 90 degree 24 pin adapters for the 12v power cables that set the wires so close to going under the motherboard that the color of the wire isn't important, and same for the video card where I found a 180 degree 8 pin adapter that then route the cable directly down and again under the motherboard, instead of out of the top of the card.

    I've never paid much attention to the internals of my computers, but thought I would give my new build a go this time. I'm not using the Corsair RGB case model, and I'll be using 6 Noctua 1500RPM gray fans (no LEDs). I just want to try and build the cleanest rig I can that is also appealing aesthetically. The only lights will be from RAM, the MB itself, and possibly a short light strip only.

    Thanks for the reply.

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    Quote Originally Posted by DWD1961 View Post
    At only 10" extensions, would resistance be an issue?
    Yes. Don't get extensions. Get a proper cable kit.

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    Quote Originally Posted by DWD1961 View Post
    My mistake! They sell the entire cable. However, the question still stands. What AWG should I be looking for for extension cables?
    What gauge are the Corsair PCIe cables?

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    Quote Originally Posted by DWD1961 View Post
    What gauge are the Corsair PCIe cables?
    16g to the first connector. 18g on the pigtail.

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    Quote Originally Posted by Jon Gerow View Post
    16g to the first connector. 18g on the pigtail.
    Just a quick question: Why is 16 AWG needed when there are 3 12V connections on the 6 pin connector and 4 12V connections on the 8 pin connector, spreading the current out over 3-4 wires? Wouldn't 16 AWG do the job with plenty of head room?

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    Quote Originally Posted by DWD1961 View Post
    Just a quick question: Why is 16 AWG needed when there are 3 12V connections on the 6 pin connector and 4 12V connections on the 8 pin connector, spreading the current out over 3-4 wires? Wouldn't 16 AWG do the job with plenty of head room?
    I think you mean't "18g" in the last sentence.

    And the answer is no. Not at high loads. Not if you understand Ohm's law.

    I mean... a 1 to 1 cable can get away with 18g. But not with the added pig-tail. I mean, it will work. But there IS voltage drop.

    Also, 8-pin PCIe is not 4 x 4. It's 3 +12V and 5 ground (5th ground pin being a "sense" pin so the graphic card knows there's an 8-pin installed).

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