I have similar memory as you Alundran, expect mine is the "DDR3 12800C9" (1600mhz), I'm putting 1.68v (in bios) through them. They get warm at times. As you're only oc'ing from 1333mhz -> 1600mhz I would not have thought you would need any addn'l cooling (as DM + absic have said)
Just make sure you have a good airflow through your case.