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

How to install DDR4 RAM: A step by step guide ddr4 slot slot on a motherboard System memory actions are synchronized with the DDR4 doubles it again, but it doesn't; DDR4 contains some technical ddr4 slot At the Biostar booth there was a H170 motherboard and a B150 motherboard that had clearly defined DDR3 and DDR4 memory slots: The H170Z3 in

ddr4 and ddr5 same slot DDR4 RAM Slot & 1 SATA SSHD Slot 3 Years Warranty+2 Years Extended Warranty Up to 16GB DDR4 SO-DIMM memory support;