Driver installation on second PCI does not work for dual GPU

I have 2 RTX 3090 running on RHEL 8. The problem is that nvidia-smi recognize only one GPU after driver installation, so it is impossible to run simulations on both GPUs.
Also, lshw recognize both GPU but the second one has no driver.
It seems it is a PCI port issue but changing configuration in the BIOS did not solve the problem.
We tried reinstalling drivers but it did not work.

Did you need any other information to help ?
Thanks in advance !