hardware - What's the bandwidth and form factor for PCIe x1 x4 x8 and x16? - Server Fault
IOIUSB | U3X4-PCIE4XE303 | Quad channel 8-port (2-port x 4) USB 3.0 to PCI Express x4 Gen 2 Host Card
What is the difference between PCIe Gen 3 and PCIe Gen 4? - Kingston Technology
Amazon.com: FebSmart PCIE X4 to 2X 10Gbps Max Speed USB 3.1 GEN2 Type E Key A Ports Card, USB 3.1 GEN2 10Gbps Header for Desktop PCs Front Panel USB-C Ports, Built in