Question - GPU PCIe 4 in a PCIe 3 slot

Question - GPU PCIe 4 in a PCIe 3 slot pci 4 in pci 3 slot Important: You'll also have to be sure the motherboard actually has a PCI Express slot implemented The chipset is not a guarantee of that, just an pcie 30 x1 slot 4-3, per single PCI Segment Group show less , ECN, November 18, 2018 Errata for the PCI Express® Base Specification Revision , , Errata, October 31

pcie 30 x1 slot SYONCON PCIe Multiplier, PCIe Splitter 1 to 4 PCI-Express 16X Slots Riser Card, PCI-E 1X to External 4 USB Adapter for BTC Miner Machine GPU Mining

pcie 20 x1 slot A PCIe graphics card will work in a PCIe motherboard slot at PCIe speeds For PCIe graphics cards, maximum graphics throughput I'd really like to have 1 PCIe x8 Gen 5 slot + 2 PCIe x8 Gen 4 slot + 3 PCIe x4 Gen 3 slots on such a backplane at the same time for instance