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Corsair CJ

By Corsair CJ

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NVIDIA’s GeForce RTX 40-Series Founders Edition graphics cards have been announced, featuring higher levels of performance and the inclusion of a new power connector that we’ve noticed the community has questions about.

Is Your PSU Ready?

The 12VHPWR / PCIe 5.0 power connector on the side of these graphics cards is part of the upcoming ATX 3.0 power supply specification. So, you may be asking if your current power supply is up to the task.

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The good news is that, yes, your current power supply is likely to do just fine with the right cable configuration. While these new graphics cards will be supplied with an adapter that converts up to three PCIe 8-pin power connectors into the necessary 12VHPWR to supply board power, you’ll need to ensure that you’re using multiple, high quality PCIe power cables in the first place. Each 8-pin PCIe power connector must be rated to take on a load of 225W of power, so for the adapter supplied with the new RTX 4090 you’ll need three dedicated PCIe 8-pin power connectors (from separate cables coming off of your PSU) to hit the max 600W rating of the 12VHPWR connector while also accounting for any inefficiencies introduced by the adapter.

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To simplify things, we’re introducing a dedicated 12VHPWR Type-4 cable that runs up to 600W of power directly from your Type-4 CORSAIR PSU. Giving you peace of mind that your graphics card is getting all the power it needs, while also simplifying cable management (we know that cable bulk adds up very quickly). Each of the two PSU-side connections is rated for 300W of power per connector, adding up to the 600W needed for the 12VHPWR side for your graphics card.

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As mentioned, this cable is compatible with all Type-4 CORSAIR power supplies, however to ensure that load requirements are met, here’s a quick reference for our recommended PSU wattage (allowing some headroom for potential overclocking).

  • 1200W PSU -> 600W max graphics card load
  • 1000W PSU -> 450W max graphics card load
  • 750W PSU -> 300W max graphics card load

RTX 40-Series Power Supply Q&A:

Q: Do I need an ATX 3.0 PSU to run a 40-series graphics card?
A: No, ATX 3.0 is an upcoming specification for power supplies and is not required for RTX 40-series.

Q: Do I need a PCIe 5.0 power cable to run a 40-series graphics card?
A: No, every 40-series Founders Edition graphics card will include an adapter in the box and many third-party board makers may use the current 8-pin PCIe connectors on their 40-series offerings which would be compatible with your PSU.

Q: How much power do I need for a 40-series graphics card?
A: From NVIDIA:

  • 850W PSU for RTX 4090 (450W)
  • 750W PSU for the RTX 4080 16GB (320W)
  • 700W PSU for the RTX 4080 12GB (285W)

Closing Thoughts

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As with every new generation of graphics cards, we're excited to see new levels of performance and even more awesome builds! Are you planning to upgrade or build a new gaming PC when NVIDIA GeForce RTX 40-Series drops? Let us know in the comments!
 

 

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Welsh Jester

I've seen people mention concerns over adapter cables overloading the power supply, and recommending to buy an ATX 3.0 one instead. And the limited amount of times you can plug/unplug the cable.

Would there be any issue with using the adapter with a 4090 for example?

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  • Corsair Employee
Corsair HP
  • Corsair Employee
On 9/23/2022 at 11:31 PM, xtaz said:

So how come the adapter needs 3 seperate 8-pins on the power supply, but the dedicated cable only has 2?

This cable plugs directly into the PSU via our type-4 connector, each of which will push well beyond 300W. This is why only 2 connectors are needed.

 

The adapters shipped with the GPU's are reliant on PCI-e specifications and must take into account that each of the 8 pin PCI-e connectors might only be able to push 150W.

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NLo

Hi, will you release a single sleeved version of the 12VHPWR Type-4 cable?

I'm a proud owner of an AX1600i PSU, but the cable you've just released is too ugly for me 🙂

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Gucky
On 9/23/2022 at 11:31 PM, xtaz said:

So how come the adapter needs 3 seperate 8-pins on the power supply, but the dedicated cable only has 2?

The 3x8-Pin Adapter is rated for the intended 450W. So it needs 3x150W.

But Type4 PCI-E Cables of Corsair are 1x8-Pin to 2x8Pin Cables (daisychain), meaning each 8-Pin Connector on the PSU-Side is rated to provide upto 300W.

Thus the 600W 12VHPWR cables only needs 2x8-Pin on the PSU side.

 

On that note, I intend to run a 4090FE with the SF750 PSU, since there is no higher SFX PSU from Corsair...yet.

I do have a Powerbudget of 550-600W left for the GPU, so it should work.

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MLTrob86

The question is WHEN you (corsair) be releasing and ATX 3.0 PSU? Personally I don't care of adapters / your better adapter I just want the right PSU , no round the corner solutions just the best conditions for the GPU if I will ever considering buying one. So yeah an estimated date would be really helpful , I know there's already other big brands that have the new PSUs already so why its taking so long for you guys?

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