After I do not know if it comes from the adapter or my Gigabyte motherboard, but I had to test different PCI Express slot before finding one that does not cause a conflict with my integrated USB 3.0 ports.
In the end, I had to buy another expansion card for additional USB 3.0 ports and the conflict miraculously disappeared.
With an Intel 4965AGN and 3 antennas, sensitivity and performance is really excellent compared to USB models.