Will ddr3 ram work with a ddr4 motherboard

This video gives you answers of: ○ DDR4 in DDR3 slot ○ DDR3 1600Mhz in DDR3 1333Mhz

The socket H2 supports dual-channel DDR3 memory with data rates up to 1600 MHz, Direct Media Interface running at 5 GTs, and PCI Express and

ddr3 vs ddr4 slot CPU Socket All, SP6, SP5, SP3, G34, FT3, C32, AM5, AM3+ Socket Count All, 1P DDR3 Memory Channels All, 12, 8, 6, 2 System Memory Specification All, Up

ddr3 in ddr4 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