What will happen if I mix DDR4 RAM and DDR5 RAM in my PC?

What will happen if I mix DDR4 RAM and DDR5 RAM in my PC? ddr4 and ddr5 same slot Despite the similar physical size and shape of RAM generations, compatibility differs Attempting to insert DDR4 RAM into a server motherboard ddr4 in ddr5 slot If you compare two similar laptops, one using a DDR memory and the other using an LPDDR memory, you won't be able to notice the difference

ddr4 in ddr5 slot DDR4 and DDR5 memory when it comes to gaming laptops? I've compared two laptops

ddr4 and ddr5 same slot DDR4 and DDR5 are not compatible, as they are different memory technologies DDR4 motherboards are designed to support DDR4 memory modules, and DDR5 graphics In past DDR gens , servers handled UDIMMs and RDIMMs interchangeably In DDR5, they're not compatible; RDIMMs and UDIMMs are no