Can I Use a PCIe NVMe SSD in a PCIe Motherboard Slot?

Maybe upgrading is pointless… - PCI-E Gen 4 vs Gen 3 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 4 m2 in pcie 3 slot PCIe 4 is backwards compatible with gen 3, 2 & 1, and you will get at least the same performance from putting a drive in a slot as you

pcie 1 slot I have recently bought a B450 mobo, and it comes with CrossFire support The thing is, only one of the PCIe slot is x16, the other one is x4 I have a