Does DDR4 mean 4 RAM slots?

Can we put DDR4 ram in DDR3 Slot or DDR3 1600Mhz ddr4 slot Socket LGA1700 for Intel 14th 13th & 12th Gen Processors • Intel B760 • DDR4 4 x DIMM • 2 x DP • 2 x HDMI • 2 x slots • 4 x SATA 6Gbs ddr4 vs ddr5 slot Up to DDR4 3200 MTs; Max # of Memory Channels 2; Max Memory Bandwidth GB The socket is the component that provides the mechanical and

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