GPU Power Plug

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kiwis

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#323531 12-Dec-2025 17:50

This might be a stupid question but want to do it right.

I'm upgrading my GPU from a 1x 8 pin connector to a GPU with 2x 8 pins.

in the photo the top right connector is my GPU. Can I just use a spare one from the row below for my second power connection ? They’re all marked PCI-e?

Jase2985

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#3443144 12-Dec-2025 17:59

@kiwis there is no photo

what GPU and what PSU do you have?

Can you just use the daisy chain connectors on the first connector to the GPU as long as its not an 80 or 90 series card it will be fine

kiwis

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#3443146 12-Dec-2025 18:11

Sorry here you go

C850 Gold and RX 9070XT

Jase2985

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#3443150 12-Dec-2025 18:21

yes as your GPU is coming off the PCI-E on the top row so you can use a PCI-E on the bottom row with no problems

you should have got 3 of those cables in the box

IronH

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#3443466 13-Dec-2025 10:12

This won't apply to OP as a 9070XT draws over 300W. But for those who have GPUs that have 2x 8pin connectors but draw less then 300W: if you have 2x 8pin connectors coming off the same cable, you probably don't need to use 2x separate cables. A single cable (assuming 18 AWG) can handle ~300W and each 8pin connector (PCI SIG) ~150W. If it's close to 300W then 2x separate cables for extra safety margin is not a bad idea. If it more than 300W then defo use two cables.

Or at least that's my understanding, hopefully someone else will correct me if it's wrong or verify if it's right.

Batman

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#3443617 13-Dec-2025 12:46

IronH:

This won't apply to OP as a 9070XT draws over 300W. But for those who have GPUs that have 2x 8pin connectors but draw less then 300W: if you have 2x 8pin connectors coming off the same cable, you probably don't need to use 2x separate cables. A single cable (assuming 18 AWG) can handle ~300W and each 8pin connector (PCI SIG) ~150W. If it's close to 300W then 2x separate cables for extra safety margin is not a bad idea. If it more than 300W then defo use two cables.

Or at least that's my understanding, hopefully someone else will correct me if it's wrong or verify if it's right.

it really depends on the internal design of the PSU. how much power is able to go to which output, peak or constant, etc

Jase2985

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#3443626 13-Dec-2025 13:43

Batman:

it really depends on the internal design of the PSU. how much power is able to go to which output, peak or constant, etc

not really, they are designed to a standard, ATX 2.0 or ATX 3.0 which dictates how things are arranged and their outputs.