What is the Difference Between PCIe Gen 3 & Gen 4?

SYONCON PCIe Multiplier, PCIe Splitter 1 to 4 PCI-Express 16X pci 4 in pci 3 slot May well be as it is working fine in PCIE x16 slot three off the chipset and PCI E x16 slot one is CPU may be the odd chance CPU is not seated pcie 8x slot While PCIe devices can work in PCIe slots, they may be limited by the lower bandwidth and data transfer rates of the PCIe standard

pcie 4 gpu in pcie 3 slot PCI-E versions are Backwards Compatable it will work all you may get is limited Bandwidth from your PCI-E Slot to your PCI-E Graphics