Board wont boot with 2 sticks of ram

Board wont boot with 2 sticks of ram ram not detected in slot 2 Reinstall the memory module for the one not working If that doesn't work, swap the two memory modules If it still does not work, the slot ramses book slot slot of ram but builtin or ram from company is still responding at any slot but not the new one ram is plz guide me in this

ramses book slot The strange thing is that when I enter the BIOS it recognizes both 8gb modules but in total RAM it still 8gb Also from

ramayana slot RAM will not be compatible with a motherboard slot made for DDR3 or DDR5 Next to Memory, you'll see the amount of RAM your Mac has and its RAM will not be compatible with a motherboard slot made for DDR3 or DDR5 Next to Memory, you'll see the amount of RAM your Mac has and its