MSI Z87-G43 showing 1333Mhz instead of 1600Mhz

hamzam7

Honorable
Nov 2, 2013
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10,630
My motherboard is MSI Z87-G43,
I have installed two Corsair Venegence RAM CMZ4GX3M1A1600C9 in slots 2 and 3. The system only shows clock speed of 1333Mhz during boot. why is it so?? should it not be 1600Mhz?