This Chinese motherboard supports DDR4 and DDR5 RAM

Can you use DDR4 memory with DDR5 cpu intel? does ddr4 fit in ddr5 slot DDR4 and DDR5 memory when it comes to gaming laptops? I Tested 0:28 Which Laptops does acer aspire 3 have sd card slot Just to clarify DDR5 is not backwards compatible with DDR4, it's a completely different DIMM slot There will be DDR4 and DDR5 Alder Lake

does it matter which pcie slot i use Just to clarify DDR5 is not backwards compatible with DDR4, it's a completely different DIMM slot There will be DDR4 and DDR5 Alder Lake