PCIe cable ?
PCIe cable ?
I own a Corsair RM750 and an Asus 4050 that only needs one 6+2 cable. Are you certain about the GPU? Do you have a link to it? How long has the PSU been in use and what role did it play during its lifetime? Could it be done to use the non-pigtail end for the GPU and the end with the extra 6+2 pigtail into the PSU for a neater appearance? It is recommended to use separate harnesses from the PSU that connect directly to the GPU for better reliability; you can find more details here: https://file.thermaltake.com/file/qig/Co...GPU_en.pdf. Other sources also suggest this approach, though adapters and pigtails have been linked to hardware damage or fires.
I need to be very cautious before "reversing" a modular PSU cable, particularly for such a minor task. Is it worth watching "magic smoke" appear from a failing component just to improve the appearance of the build? If you're willing to proceed and you have a multimeter, inspect the pinout at each end of the cable using the meter set for continuity (Ohms) and verify there are no "crossed connections".
If you're certain about the one-to-one mapping at both ends, record the polarity of all pins on the GPU input. Then, test the system with the PCIe lead disconnected and measure the voltage on each pin at the free end of the reversed cable in the 8-way connector. Ensure you get +12V on the relevant pins and 0V on the others. Remember to set your multimeter to the 20V DC range or similar.
If you have any uncertainties, refrain from connecting the cable when reversed—it could lead to a costly mistake.
Avoid using a Corsair Type 4 PCIe cable with a single 6+2 pin connector
https://www.corsair.com/us/en/p/pc-...co...cp-8920243
I think the original poster likely already owns this cable, as shown below.
It's hard to tell on the Corsair webpage whether the end that connects to the modular ATX PSU has a single 8-pin connector or a second split 6+2 pin, similar to what's at the GPU end.
https://www.corsair.com/us/en/p/pc-...-4...-techspecs
This cable won't provide the OP with the desired clean-looking 8-pin connector at the GPU end, only a 6+2 pin "eyesore" that they already have.