Question A dumb question about 12pin PSU/GPU adaptors and 6Pin Pcie Cords

[PilotFlapjack12]

I got a dumb question.

Just upgraded my PSU from a Thermaltake Smart BM3 750 W 80+ Bronze Certified to a Corsair RM850e 850 Watt 80 Plus Gold
(About damn time I threw away that bronze for a gold)

But the version i have doesnt come with a 12pin slot on the PSU, however, I have a 12pin adaptor that came with the GPU (4070ti super)
Short and simple question
How exactly do I plug this in?

Do i connect 1 Pcie plug into the PSU and simply connect both ends to each adaptor slot?
or
Do I connect an enterily new Pcie plug into the back of the PSU and connect that into the 2nd end of the adaptor? (essentially having two plugs)

I heard folks say, do not "pigtail" the adaptors, no clue if this was what they were referring to or not. Just trying not to burn up the GPU or start a fire.

Check the photos for context (please pardon our dust).

New PSU Box
1 Cord attached to the adaptor (Do i only plug one 6pin Pcie cord and feed the 2nd end into the 2nd part of the adaptor?)
Back of the PSU with everything plugged in ( Do I plug in another Pcie cord and feed it to the 2nd end of the adaptor?)
Another picture of the adaptor

 

[SkyNetRising]

How exactly do I plug this in?
Do i connect 1 Pcie plug into the PSU and simply connect both ends to each adaptor slot?
or
Do I connect an enterily new Pcie plug into the back of the PSU and connect that into the 2nd end of the adaptor? (essentially having two plugs)

Use two separate cables going to PSU.

 

[thestryker]

Right on the PSU box it says ATX 3.0/PCIe 5.0 which means it absolutely should have come with a 12VHPWR cable. I believe the cable for that one is two 8-pin connectors for the PSU side with the 12+4-pin on the other side.

If you do not have this cable and bought it new then you need to get the PSU replaced.

If you bought it used/open box and expected there to be missing cables then do as SkyNetRising suggests.

 

[SkyNetRising]

Right on the PSU box it says ATX 3.0/PCIe 5.0 which means it absolutely should have come with a 12VHPWR cable.

You're mistaken. No 12VHPWR connector.

You can check cables available at corsair support page.
Scroll down to section: RM850e DC CABLE LISTING

https://www.corsair.com/ww/en/p/psu...HQzuv7n4jEK8hKFOqpWDmZd5DRpYFPBngPJCEUFR_Kq9Y

 

[thestryker]

You're mistaken. No 12VHPWR connector.

You can check cables available at corsair support page.
Scroll down to section: RM850e DC CABLE LISTING

https://www.corsair.com/ww/en/p/psu...HQzuv7n4jEK8hKFOqpWDmZd5DRpYFPBngPJCEUFR_Kq9Y

There are multiple RM850e versions and the box the OP took a picture of literally says ATX 3.0/PCIe 5.0 in the upper right corner.

https://www.corsair.com/us/en/p/psu...-atx-power-supply-cp-9020263-na#tab-techspecs

 

[SkyNetRising]

Oh right. There's a newer version of this PSU model.
I wish they adjusted model name to differentiate between model versions.

 

[thestryker]

I think this is the 2023 model and there's a 2025 model too. Corsair definitely should come up with some better way of handling it.

 

[Eximo]

Yes, all inputs to the 12VHPWR adapter need to be connected to a 6+2 PCIe connector. If you don't, the sense pins will tell the GPU to only draw 150W. That adapter is only rated for 300W, thus the two 8-pin connections.

You should also be able to get a cable directly from Corsair if you don't have one included with your PSU.

RM850e is a Type-4 PSU:

https://www.corsair.com/us/en/p/pc-...5-0-12v-2x6-type-4-psu-power-cable-cp-8920284

This will let you comfortably run all but the highest end GPUs that use 12VHPWR. I say that because the 850W unit really shouldn't be running a 4090 or 5090.