Types of PCIe Slots Explained

Hi everyone, I want to upgrade my custom build TrueNAS to 10GbE However, I find that the motherboard only remain a PCIe x1 (in x16

Thus, a PCI Express x16 slot offers a maximum theoretical bandwidth of 8 GiBs, while a PCI Express x16 slot reaches 16 GiBs [amazon box

pcie x16 expansion slot slot can handle almost exactly what a PCIe x16 slot can currently handle PCIe x2 will still work with a PCIe x8 interface

pcie 4 ssd in pcie 3 slot PCIe cards that were working on older slots I want to know if I can use my old NI PCIe cards on the new computer because I'm not