How to Check Motherboard PCI Express Version

Because I'm using HBA's that need the largest PCI slot, I wanted to have a simple GPU for basic purposes only 1 Piece PCI-E 16X Riser Board

​Table 1 shows the scalable bandwidth that PCI Express delivers for different lane widths compared to PCI For example, a x1 PCI

pcie 1 slot PCI-Express The PCI Express link is built around pairs of serial , unidirectional point-to-point connections known as lanes

pcie slot What is it and how can I use it? (With 1-slot GPUs, other connectors are visible, including one which is probably the old PCI connection