Can you use DDR4 memory with DDR5 cpu intel?

Attempting to insert DDR4 RAM into a server motherboard designed for DDR3 is not feasible, just as DDR3 cannot fit into a DDR4 slot DDR3 vs

On the contrary, this is a DDR5 issue Across both platforms a lot of people have encountered problems when trying to use 4 dimms at speeds up

ddr5 in ddr4 slot 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

ddr5 slot compatible with ddr4 I have 4 DDR5 slots and 2 sticks of ddr ram, the slots are marked A A and B B in that order, the mobo shows the first slot in A and B are