I’m running two 3090s on a 700w psu. You definitely can get more than that out of 2000w bus.
I wrote a blog on reducing the power limits of nvidia gpus. Definitely try it out. https://shelbyjenkins.github.io/blog/power-limit-nvidia-linu...
I wrote a blog on reducing the power limits of nvidia gpus. Definitely try it out. https://shelbyjenkins.github.io/blog/power-limit-nvidia-linu...
I would say that power limiting is a potential work around, and it should work perfectly fine for inference, but when it comes to trainning you will want to squeeze every ounce of power. So, depends on your goal.
What CPU/Mobo/Storage are you running with those two 3090s for a 700w to work? I am gonna say, if at any point you're pushing more than 500w out of that PSU, you might be risking the 80% safety rule. I would have at least used a 850w just to be safe with two 3090s + rest of hardware.