Z690 motherboards will support both DDR4 and DDR5 memory

DDR5 DRAM ddr5 in ddr4 slot EEB CEB SBC Memory Type DDR5 · DDR4 Memory Slots 8 · 6 · 4 · 2 Graphics Interface PCIe · PCIe · PCIe PCIe x 16 Slots 7 · 6 · 5 · 4 · 3 ddr5 slot compatible with ddr4 DDR4 is not backward-compatible with DDR3 so a DDR4 DIMM will not fit on a DDR3 DIMM slot Not only is the key notch of each DDR generation

ddr5 slot Motherboard ddr4 : XeZX MSI B660M Mortar Wifi Motherboard