I had the same problem with an older USB3 PCIE card So I replaced it with this one:
StarTech com Dual Port USB 3.1 Card – 2X USB-A – 10Gbps per Port – Expansion Card – PCI Express USB Card – PCI-e to USB (PEXUSB312A2)
But the Oculus PC app still thinks the Quest is connected to a USB2 port. Is there a specific card that is guaranteed to work? I am using the PartyLink cable.