Ram for v formula z

[Gat]

Hi I'm wanting to upgrade my ram any suggestions I have g skill as of now. Something a bit faster ?
I found these sets it says it well work ?

[RipjawsX] F3-14900CL9Q-16GBXL
http://www.gskill.com/en/product/f3-14900cl9q-16gbxl

[RipjawsX] F3-12800CL9Q-16GBXL
http://www.gskill.com/en/product/f3-12800cl9q-16gbxl

[Sniper] F3-12800CL9Q-16GBSR
http://www.gskill.com/en/product/f3-12800cl9q-16gbsr

[emissary42]

Why not get a 2x8gb kit? Your mainboard and CPU should have no problems with that and an even higher memory speed (DDR3-2133/2400). You might have to manually adjust nb-voltage and a timing or two, either way.