The Application of PCI and PCIe in Video Capture Cards - Magewell
Amazon.com: Sinefine PCI-E to USB Expansion Card, USB 3.0 5Gpbs(3 x USB A - 2 x USB C - 1 x Internal 19-Pin Header) - USB PCI Express Card, PCIE Motherboard Card
4 Port PCIe USB 3.0 Card - 2 Ext & 2 Int - USB 3.0 Cards | Add-on Cards & Peripherals | StarTech.com
PCIe Gen 4 vs. Gen 3 Slots, Speeds
How to check the PCI-E version that my motherboard supports - Quora
PCIe Gen 4 vs. Gen 3 Slots, Speeds
MSI Announces World's First PCI-E Gen 3 Motherboard | HotHardware