Does DDR3DDR2 RAM Work on DDR4 Motherboard?

What Will Happen If You Plug In a DDR3 into a DDR4 Motherboard ddr3 in ddr4 slot DDR3 Memory · iCUE RGB Memory · Mac Memory · Laptop Memory FEATURES VENGEANCE® LPX 64GB DDR4 DRAM 3200MHz C16 Memory Kit ddr3 vs ddr4 slot PCIe x16 Slots 1 2 3 4 5 7 Memory Type DDR5 DDR4 Memory Slots 2 4 8 12 AURA

ddr3 slot Orange Pi 5 Plus（32GB） Rockchip RK3588 8-core 64-bit processor，32GB LPDDR4X, slot supporting SSD and Wi-Fi 6BT module AllWinner H3H5 SoC, 512MB DDR3