NVIDIA-SMI Shows ERR! on both Fan and Power Usage

This issue is due to the higher temperature.

First, you should reseat the question card to the coolest location of your workstation.

Second, set the power limitation [1] and fan speed [2] to ensure the peak temperature does not exceed 75C.

[1] Change them to 150W-to-200W
sudo nvidia-smi -pm 1
sudo nvidia-smi -pl 150(200)

[2] https://github.com/boris-dimitrov/set_gpu_fans_public

Using these methods, I have restored two 1080ti cards which have the same issues.