What does the X4 mean in an PCIe Gen X4 NVME drive?

PCI Express 5 : Here's everything you need to know about can i use m 2 pcie 4 0 in 3 0 slot Just to be clear, you can run a PCIe SSD in a PCIe slot , it just runs at PCIe speeds Which kind of negates the purpose candy tower slot 2 Slot is from the Ryzen 7 5700G then it will only support PCIe Found this tech site that explains that a Motherboard can have both PCIe and slots:

canada slot machines However, performance will be limited to the specifications of the lowest of the two versions Related articles What Are PCIe and ? Related Products