Question PCIe cable ?

[Newbuilder1]

I have a Corsair RM750 PSU and an Asus 4050 GPU that only requires one 6+2 pin cable. My PSU came with the 6+2 pigtails. Is it possible to use the non pigtail end to plug into the GPU, and plug the end with the additional 6+2 pigtail into the PSU for a cleaner look?

 

[Lutfij]

I have a corsair RM750 and a Asus 4050 that only requires one 6+2 cable.
Are you sure about that GPU? Got a link to the GPU? How old is the PSU in question and what did it power throughout it's tenure?

Is it possible to use the non pigtail end to plug into the GPU and the end with the additional 6+2 pigtail into the PSU for a cleaner look?
You're advised to have standalone harnesses from the PSU terminate at the GPU for the sake of reliability;
https://file.thermaltake.com/file/qig/Connect_PCIe_Cables_to_High_Power_Consumption_GPU_en.pdf
There are other sources, depicting the same suggestion.

Adapters and pigtails have been known to be the cause of damaged hardware or fires.

 

[Misgar]

Is it possible to use the non pigtail end to plug into the GPU and the end with the additional 6+2 pigtail into the PSU for a cleaner look?

I'd be very careful indeed before "reversing" a modular PSU cable, especially for something so trivial. Is it worth watching "magic smoke" emanate from a dying component, just to make the build look pretty?

If you're determined to go ahead and you have a multimeter, check the pinout at each end of the cable with the multi meter set for continuity (Ohms) and make sure there are no "crossed connections".

If you confirm there is one-to-one mapping at both ends, make a note of the polarity of all pins on the GPU input and using an alternative GPU, power on the system with the PCIe lead disconnected and measure the voltage on each pin at the free end of the "reversed" cable on the 8-way connector.

Make sure you get +12V on the relevant pins on the 8-way GPU PCIe connector and 0V on the other pins. N.B set your multimeter to the 20V DC range or similar.

Any doubts, do not connect the cable when reversed. It could be a very expensive error.

 

[--SID--]

Is it possible to use the non pigtail end to plug into the GPU and the end with the additional 6+2 pigtail into the PSU for a cleaner look?

NO!

Better get a Corsair Type 4 PCIe cable with a single 6+2 pin connector https://www.corsair.com/us/en/p/pc-...connector-type-4-gen-4-aca-a-black-cp-8920243

 

[Misgar]

Better get a Corsair Type 4 PCIe cable with a single 6+2 pin connector

I get the impression the OP already has this cable, see below.

My psu came with the 6+2 pigtails. Is it possible to use the non pigtail end to plug into the GPU and the end with the additional 6+2 pigtail into the PSU for a cleaner look?

It's difficult to see on Corsair web page if the cable end that plugs into the modular ATX PSU has a single 8-pin connector or a second split 6+2 pin, as found at the GPU end.

https://www.corsair.com/us/en/p/pc-...-4-gen-4-aca-a-black-cp-8920243#tab-techspecs

This cable will not give the OP the required "clean looking" 8-pin connector at the GPU end, just a 6+2 pin "eyesore" which they already have.

 

[--SID--]

I get the impression the OP already has this cable, see below.

OP has a pigtail/daisy chained cable where one 6+2 connector is unused and dangling down. OP wants the cleaner look of a PCIe cable with a single 6+2 pin connector at the end. What I suggest is the correct solution.

 

[Misgar]

OP has a pigtail/daisy chained cable where one 6+2 connector is unused and dangling down.

Aha. I see where I went wrong now. You correctly identified the OP meant "daisy chained" and I took the term "pigtail" (as in curly like a pig's tail) literally. Mea culpa.