Hi,

I, like many, am awaiting my ftw Ultra.

Currently running a 1080ti ftw, with 2 8 pin pcie cables direct from the psu. Trying to figure the best option to get a 3rd for the 3080.

I have an old Corsair Hx1000, the only spare cables I can find are 2 6 pin pcie cables, and a sata.

I'm thinking either a 6 to 8 pin adapter, this way it has 3 separate cables from psu.
Or an 8 pin splitter, but this way it has only 2 dedicwcabkes from psu.
I don't think there is anyway to link 2 6 pin supplies into an 8 pin? As this would in theory provide the 150w (75 x 2) of a normal 8 pin.

I'm open to any other suggestions (other than buying a new psu). I've looked for a modular cable to fit, but seems a bit of a minefield that it will be pinned the same as my psu. Even on corsair list multiple types, and my psu is old! But it's never slipped a beat, so not looking to replace it.

I'm probably getting too caught up in it. My understanding is the pcie can provide 75watts, each 8 pin can provide 150watts, and a 6 pin is another 75watts.

Thanks

Do you mean it takes 2 6 pin connectors, and turns it into 1 8 pin? Or the standard takes 2 6 pin into 2 8 pin?

https://store.cablemod.com/configurator/
 
Can get a bit pricey if you do a custom cable.  A basic 8-pin replacement is probably under $15...but the shipping is expensive due to shipping from China.
 
https://www.corsair.com/us/en/Categories/Products/Accessories-%7C-Parts/PC-Components/Power-Supplies/Type-3-Sleeved-Black-PCIe-Cable/p/CP-8920111
 
Or hit notify on this and wait for it to come back in stock.
 
Apologies - yeah, these wouldn't work with yours.

EVGA Supernova has 2X 8 pin and 1X 6+2 pin.

Your old HX 1000 is this?
according to this video and page the PSU provide 4x 8 pin PCI-E and 2x 6 pin PCI-E
youtu.be/GuCogPvd-jM?t=277
www.jonnyguru.com/blog/2008/05/12/corsair-hx1000-power-supply



 

I_R0M_I
Thanks for the links. Was un aware Corsair sold them separately.

My only worry, is they don't actually list any for my psu. I'm assuming mine will come under 'original hx' as its really quite old. So it's in stock in the UK, but worried it won't work, or will damage something. I'm assuming if it did fit, they would list it.

Apologies.  You are correct.  According to this: https://www.corsair.com/us/en/psu-cable-compatibility
 
You would need a different cable.

You could use something like this and it should be okay - https://www.newegg.com/p/N82E16812198032
 
 

I_R0M_I
Hi,

I, like many, am awaiting my ftw Ultra.

Currently running a 1080ti ftw, with 2 8 pin pcie cables direct from the psu. Trying to figure the best option to get a 3rd for the 3080.

I have an old Corsair Hx1000, the only spare cables I can find are 2 6 pin pcie cables, and a sata.

I'm thinking either a 6 to 8 pin adapter, this way it has 3 separate cables from psu.
Or an 8 pin splitter, but this way it has only 2 dedicwcabkes from psu.
I don't think there is anyway to link 2 6 pin supplies into an 8 pin? As this would in theory provide the 150w (75 x 2) of a normal 8 pin.

I'm open to any other suggestions (other than buying a new psu). I've looked for a modular cable to fit, but seems a bit of a minefield that it will be pinned the same as my psu. Even on corsair list multiple types, and my psu is old! But it's never slipped a beat, so not looking to replace it.

I'm probably getting too caught up in it. My understanding is the pcie can provide 75watts, each 8 pin can provide 150watts, and a 6 pin is another 75watts.

Thanks

Considering the age of the PSU and the fact that the PSU is internally two separate 500 watt power supplies, one for each rail...I'd buy a new one. (despite what you said) They never skip a beat, until they do.  I do not know why, if you're spending that much on a GPU, you would use a substandard PSU. (it is nothing personal, I have a HX1000, probably still works fine. However, the dual 500 watt construction, was causing issues with balancing the load with SLI).

Jonci025
The compatability chart has
"The only difference between Type 3 and Type 4 cables is the pinout of the 24-pin ATX cable; all other cables (SATA, PCIe, etc) are the same.
 
The hx series takes either the type 3 or type 4 PCIE cables you can get a pack of 2 from SCAN for just under £19.99+p&p,  choose a colour. 
 
scan.co.uk/search?q=corsair+type+4

The chart shows the 'original hx' near the bottom, with no dots anywhere for PCIe though? I'm reading it as the cables will fit the psu that has the corresponding dots.