The problem with the DELL server not recognizing the PCIe GPUs happened not to be obvious. I fought for a week with the PSU, bios configuration, ILO flashing, firmware update, cables, different cards, etc, without success. Finally, a technician came, and, actually, my boss didn’t let him leave until our cards were seen. Here you have a look to one of our servers (a different one) with 2 shiny cards. Everybody is very happy. What’s next? More GPUs, of course. And an specific SLURM partition dedicated for GPU computing.