Mixing 2x4 with 2x8 ram

Sep 19, 2018
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Hey
I have 2X4GB Kingston Hyper-X FURY 1600Mhz
And I want to upgrade it , but I'm not sure what should I go for
Should I buy 2x8 with hiher frequency? Or the same frequency?
And will i be able to mix them?
I was thinking to get g-skill ripjaws 2x8 at 2400hz
Thanks