PCIe vs PCIe

can i put a pcie 3 0 in a 4 0 slot   Dan candy witch slot

A PCIe slot will not bottleneck the card But what CPU are you running? That might be a different story 6162021 EVGA_JacobF Nope

A PCIe graphics card can be used in a PCIe slot, but it will operate at PCIe speeds · A PCIe graphics card is backward compatible with PCIe PCIe boards can fit into slots designed for their lane configuration or higher Plugging a x4 PCIe into a x16 slot is acceptable

qwik slot That is to say, you can insert a PCIe SSD into a PCIe slot, but you won't be able to fully achieve the fast data transfer speeds of that 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