ram that will work

[cleancutcase17]

Looking for another stick of ram that will work with my kingston valueram ddr4-2132 so I can have duel channel stick is 8gb and i was wondering if it would work with a 4 gig stick or do I have to get an 8? screenshot of ram in cpu-z https://gyazo.com/ff1e24e0745b01e91b9714a0a4ca45bc

 

[Dark Lord of Tech]

ADDING or Mixing memory is hit and miss even if identical.