16 gb ram, but only shows 8 gb ram in bios.

[WolffyDK]

Hello guys im am new to this computer shit. I just added 8 gb ram more, so i got 16 gb ram now, but in bios and system it only shows that i got 8 gb ram, and i don´t what i need 2 do, plz help me <3 https://gyazo.com/85ed1087cbd9f0bfeec3a7890db105e9

 

[shadowXXe]

maybe your ram isn't installed correctly, try re-installing your ram