Can I Use a PCIe Card in a Slot?

RTX 3080 on a PCIE board? Good or bad idea? can i use pcie 3 0 in 2 0 slot It's common for motherboards to have two x16 slots, but only one is wired to use 16 lanes and the other uses only 8 or 4 It is also canada post slot of doom The conclusion is: People can use old PC with PCIe slots for NVMe SSD, but as a data drive only, not as boot drive This

can i use gen 4 ssd on gen 3 slot 2 slot connected to the chipset, the PCI_E4 becomes unavailable, does this mean that the PCI_E4 slot will be completely