Overclocking of gskill sniper f3-2400c11d 16gsr on msi z97s sli krait ed?

[goldarvainateya]

hi,
I bought a rig with
MOBO: msi z97s sli krait ed
and RAM: gskill sniper f3-2400c11d 16gsr

on gskill site the max RAM speed is given as 2400 MHz, however I'm getting 1333 MHz only....
How do I get 2400MHz speed? is OCing possible? if so, how?

 

[gskill support]

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