PCIe Layout and Routing Guidelines | Blog | Altium Designer
Amazon.com: Dual-Port PCIe Gigabit Ethernet Server Adapter with NetXtreme BCM5720-2P Chipset PCI Express 1000M Network LAN Card for Windows Sever Linux Ubuntu VMware : Electronics
PCIe 5.0 SSDs May Get Wider and Require Wider M.2 Slots | Tom's Hardware