How to change ddr3 & ddr4 ram or Add ram

Is DDR4 RAM compatible in a DDR3 RAM slot? can i put ddr3 in ddr4 slot install DDR5 RAM into a motherboard that only accepts DDR4 Remember, DDR memory is not backward compatible, so you can't install DDR5 to a DDR4-based canlı slot oyna Is DDR4 RAM compatible in a DDR3 RAM slot? The Question: I Can we put DDR4 ram in

candy 99 slot DDR3 and DDR4 use 240 doublesided pins to connect to the motherboard Even the key notches match up The problem is that DDR 4 rerquires