[Ready to Go Beyond Fast]

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.

[RTX 4090 12VHPWR Cable]

I have 4 Questions:

- How are the Sensepins in the 600W 12VHPWR Cable implemented?

- Could the 12-Pin 300W Cable from the previous 3090FE work on the 4090FE? Excluding the Sensepins, the Cable seems to be the same one as the 600W.

- And i have a SF750 PSU, from the Compatibility List, the 12VHPWR should fit. But is it?  I was going to use it with a 4090FE.

- My current powerdraw, excluding the GPU, is about 150-200W (CPU takes half of it), leaving 550-600W for the GPU. And I will be undervolt and/or powerlimit the GPU by 20%.

Thus the 4090FE will draw only ~360W. That should work with the SF750..or not?