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

What does the X4 mean in an PCIe Gen X4 NVME drive? will a gen 4 ssd work in a gen 3 slot BUT you go buy the off brand no name cheaper 1TB Gen 4 NVME for lets say, 70$ (6-7K read william slot ardadizdarogl129b02a6 said: Can I insert any NWM-e SSD to any of my slot?

william slot In this video, I will explore how to check if your motherboard supports Gen 4 SSDs or not

will a p90 fit in a humbucker slot PCIe Gen 3 vs PCIe Gen 4 PCIe offers twice the data rate and maximum bandwidth of PCIe , allowing faster data transfers The standard PCIe NVMe SSDs will work in a PCIe computer, but at slower PCIe speeds gen 3 Those sort of face-melting speeds pair