For GPU is it better to use one cable with 2x8 pin or 2 seperate cables?

[Monkeyboysteve]

Probably a stupid question.

But my grapics card requires 2 8pin connectors, is there any difference in using one cable that has 2x8pin connectors over using two seperate cables from the PSU?

I have a corsair 850 HX fully modular and it's a 1080ti (in case it matters)

I posted this in the GPU forum too as wasn't sure the best place to stick it,

 

[Monkeyboysteve]

Always separate cables with high power draw graphics cards.
Using single split in the end cable doubles voltage losses compared to separate cable.
And not only does it affect stability of 12V, but also ground refence of the card, because current causes voltage loss also on return path.
(+ power loss in cable quadruples heating cable more)

There have been cases of single cable causing instability/crashing in this forum, so it's not insignificant thing.
And in case of PSU with current limited wire groups current can exceed limit shutting PSU down.

But then why do corsair provide cables with a 2x8 split?

 

[Monkeyboysteve]

But then why do corsair provide cables with a 2x8 split?

So in my Corsair hx850 I should be fine? The cables are so think it would be a massive pain using two. Especially as that would mean I would have 2 spare 8 pin connectors just flapping around looking silly near the gpu.

 

[Monkeyboysteve]

It's going to be designed to tolerate the full power draw of both 8 pins on that cable, it would be unsafe it it wasnt and I doubt Corsair arent building their PSUs to spec.

That's what I would assume. When I asked I was thinking more about if it gave better performance to use two.

People saying these cables are unsafe seem a bit silly. Corsair would be crucified for selling unsafe power cables. Just noticed a jay2cents video where he did a comparison. He always used 2 connectors from one cable on his test bench and found only a minor difference going to two. (but it was an increase in performance)