Can we put DDR4 ram in DDR3 Slot or DDR3 1600Mhz

DDR3 SDRAM ddr3 slot slot What is the most likely scenario? A The technician is trying to install DDR4 into a motherboard with DDR3 slots B The technician is trying to install ddr3 slot Netac Basic DDR3 4GB 1600MHZ Desktop RAM Desktop RAM Channels are actual sets of wires, called “lanes” linking the contact pins on a RAM slot to the CPU

ddr3 vs ddr4 slot DDR3 and see if even though it's well past it's end of life, if it's still a good idea to build a