Can you use DDR4 memory with DDR5 cpu intel?

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Unlike DDr4 that supports up to 128GB of RAM across 4 DIMM slots, DDR5 supports up to a whopping 512GB of RAM With DDR5, they have split the

ddr4 and ddr5 same slot The problem is that DDR5 RAM is NOT compatible with DDR4 DDR4 RAM Won't Fit Into DDR5 Slots and Vice Versa

ddr4 slot With DDR5 it's always better to use two modules only (and even with DDR4 that is advised, but four modules can at least work quite decently