What is the difference between SDRAM, DDR1, DDR2, DDR3 and

Can you combine DDR3 and DDR4? ddr3 vs ddr4 slot DDR4 SDRAM : DDR4 SDRAM provides the lower operating voltage and higher transfer rate The transfer rate of DDR4 is 2133~ ddr3 slot DDR4 modules are more energy-efficient, operating only at compared with DDR3's or The reduced power consumption gives

ddr3 in ddr4 slot Is DDR4 RAM compatible in a DDR3 RAM slot? The Question: I'm looking to get a RAM