DDR5 RAM on AM5 fails to POST with all 4 slots occupied

DDR5 Memory with Protection Circuit Reinforced DIMM Slot; DIY Friendly Design The reinforced DIMM slot is surfaced mounted onto the motherboard

You cannot use DDR5 RAM into DDR4 motherboard socket Since DDR4 and DDR5 memory

ddr5 slot compatible with ddr4 Dual Channel DDR5：4*DIMMs with AMD EXPO Memory Module Support; PCIe UD Slot X： PCIe x16 slot with 10X strength for graphics card; WIFI

ddr5 slot Dual Channel DDR5：4*DIMMs with AMD EXPO Memory Module Support; PCIe UD Slot X： PCIe x16 slot with 10X strength for graphics card; WIFI