Amazon.com: Generic 1 to 3 PCI express 1X slots Riser Card PCIe x1 to external 3 PCIe slot adapter PCI-e Port Multiplier Card : Electronics
What would happen if you plugged a PCIe riser into a PCI slot. If that possible to use the PCI slots? : r/EtherMining
Amazon.com: PCIe to PCI Adapter Card,PCI Express x1 to PCI Single/Double Converter,PCI-e Extender Card with USB3.0 Cable for Desktop Sound Card (PCIe to Single PCI Slot) : Electronics
All You Need to Know about PCIe - Global American
What Is PCI Express (PCIe)?
PCI Express - Wikipedia
All about PCIe (PCI Express) – Elgato
Can this configuration work on the PCIE slots? : r/pcmasterrace