PCIe vs PCIe NVMe SSDs: What's the difference?

PCIe vs : Is PCIe Worth the Upgrade? m2 pcie 4 0 in 3 0 slot You can plug pcie into slots as it's backwards compatible but the speeds will be limited to Gen 3 It wouldn't be able to go above the m2 slot screw Due to the forward and backward compatibility, a PCIe GPU will perform like a PCIe GPU card if connected to a PCIe (or in the future

m2_1 slot Gen 4 is faster than Gen 3