Can i use DDR4 RAM on a DDR5 compatible motherboard?

TE's DDR5 DIMM Sockets are engineered for higher data rates, providing twice the speed of DDR4 solutions, and built for increased reliability to withstand

It's assumed only one slot will be active at a time, but this allows the board to work with both DDR4 and DDR5 RAM technology But also

ddr4 and ddr5 same slot DDR5 memory, the successor to DDR4 desktop and laptop memory, is the fifth-generation double data rate SDRAM, and the performance improvements from

ddr4 slot vs ddr5 The pin layout is different between DDR4 and DDR5 This means it's not physically possible to install DDR5 RAM sticks in a DDR4 laptop or vice