PC memory is about to double in max capacity

Hence, you shouldn't be able to insert a DDR4 module into a DDR5 slot, and vice versa, unless you want to risk breaking something

DDR4 DRAM module will not fit into a DDR5 slot As memory technologies evolve, the primary improvements in each new generation are increased data transfer

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

ddr4 in ddr5 slot They support the latest DDR5 RAM modules and technologies like HEVC, HDR, and VP9 10-bit encoding alongside Hi-speed USB ports and DDR4 RAM slots