How to Install DDR4 Memory on the Motherboard?

Will ddr3 ram work with a ddr4 motherboard ddr4 slot AMD B550 Memory Max 128 GB Memory Type DDR4 Memory Slots 4 Memory Speed DDR4-1866; DDR4-2133; DDR4-2400; DDR4-2666; DDR4-2800; DDR4-2933; DDR4-3000 ddr4 slot MSI Pro B760-P WIFI DDR4 Motherboard ATX με Intel 1700 Socket · 3 · 3 · από129,92 € σε 57

ddr4 slot vs ddr5 slot I imagine Just seems like a huge pain to build with 32GB DDR4 3200 16GB DDR4 3200 Video Card, EVGA XC3 Ultra RTX