What are the top differences between DDR4 and DDR5?

Can You Upgrade Your Laptop to DDR5? can you use ddr5 in ddr4 slot No, you can not can you run pcie 40 in 30 slot DDR4 is not backward-compatible with DDR3 so a DDR4 DIMM will not fit on a DDR3 DIMM slot Not only is the key notch of each DDR generation

can i put a pcie 40 in a 30 slot He says that the platform will support DDR4 and DDR5, just like Alder Lake does That's great for builders who are upgrading now but can't