DDR4 vs DDR3 - Apples to Apples Comparison

Can you use a DDR4 RAM in a DDR3 RAM slot? ddr3 vs ddr4 slot DDR4 is a pretty hot discussion topic right now, and we became curious can you expect to see ddr3 vs ddr4 slot CL46 262-pin SHOW MORE + SHOW LESS - 8GB, 16GB, 32GB, 48GB CL46 262-pin DDR3 DDR4 DDR5 Speed * Speed * 1600MTs 1866MTs

ddr3 in ddr4 slot DDR4 modules use less energy than DDR3 modules since they operate at as opposed to or for DDR3 Significant power savings result