Your RAM doesn't overclock itself, though it does have XMP profiles which the bios can read and use. You have to try the 1600mhz frequency yourself to see whether or not it is stable, and play with the voltage and timings if it is not. Even RAM rated at 1333mhz has a decent chance of being able to run at 1600mhz (good chance if it is cas7@1333mhz). Now if you tried to get your ram from 1333->1600 by overclocking the bus, you would definitely have problems on SB lol. Might not even get far enough in booting to get BSOD.
