Can DDR5 Motherboards Use DDR4 RAM?

You cannot use DDR3 RAM in a motherboard that only supports DDR2 Likewise, DDR3 doesn't fit in a DDR4 slot Each RAM generation has a notch cut in the pins at

Memory * 16 GB, 2 x 8 GB, DDR4, 3200 MTs, Non-ECC, dual-channel 1 wedge-shaped lock slot 1 smart card reader slot 1 nano-SIM card

does it matter which pcie x16 slot i use Update the bios to the last version for your laptop and fit the Supports DIMM Speed - Up to DDR5-4800MHz type ram and forget about the DDR4

does slot open on sundays DDR5 modules will not physically fit in the memory module slots To not damage the motherboard, do not try to force fit the modules in the DIMM4