Is DDR4 RAM compatible in a DDR3 RAM slot?

Most motherboards offer multiple choices for RAM You can identify which one works best in a

The socket works with DDR3 RAM with data rates up to 1600 MHz It does not support DDR4 memory The LGA1150 is compatible with Intel B85

ddr4 and ddr5 same slot  PCIe x16 Slots 1 2 3 4 5 7 Memory Type DDR5 DDR4 Memory Slots 2 4 8 12 AURA

ddr4 in ddr5 slot Most motherboards offer multiple choices for RAM You can identify which one works best in a