PCIe vs PCIX vs PCIe x1 vs PCIe x16 - SOS Forum

I thought PCIe was superceding PCIX But I have 2 PCIe x 1 slots on my motherboard, 3 ordinary PCI slots and one which is

Have you ever thought if you can plug PCI Express cards into x16 lane slot? In this video

pcie 4 gpu in pcie 3 slot Verilux® NVME Adapter PCIe x16 with Gel Pad, NVME or AHCI SSD to PCIE Adapter Card for Key M 2230, 2242, 2260, 2280 Size SSD, Support PCIe x4 x8

pcie 4 nvme in pcie 3 slot Graphics Cards · 5770 supports PCI Express up to x16 · Radeon RX 550 supports PCI Express up to x16 · PCI Express x16 is PCI Express