What is the difference between PCIe Gen 3 and PCIe Gen 4?

m 2 gen 4 in gen 3 slot   Dan m2 slot pc

I believe both slots are generation 3 because chapter 1 of the manual indicates that HP only offered Gen 3 NVMe SSD's in the model series and

Parts needed to install a device into a slot, Parts needed to 5x 4270E - *3 L screws 1 x HR8P8 Parts needed to install a device into a slot, Parts needed to 5x 4270E - *3 L screws 1 x HR8P8

gonzo´s quest slot m 2 gen 4 in gen 3 slot NVMe SSDs that support the newest Gen 4 2 slot but cannot find any information about its supporting PCIe generation (4 Gen 4 storage, the latest USB Gen 2 standard, and in some cases, Wi-Fi 6 and 10 GbE connectivity In this roundup, we'll be taking a