QNAP Systems, today launched the QXG-100G2SF-CX6 dual-port 100GbE PCIe 4.0 expansion card. Featuring an NVIDIA Mellanox ConnectX-6 Dx controller, the QXG-100G2SF-CX6 can be installed in a QNAP all-fla... QNAP Introduces Dual-port 100GbE Network Expansion Card
Probably one of the few server cards that actually takes advantage of PCIe 4.0 @ x16. Though, if they went with 5.0, it could work on x8.