Uncore clock:
How do you calculate the Uncore Frequency of Bloomfield ?
Bloomfields Uncore clock is always 2xDDR3 clock, thus if you use DDR3-1600 you'll get 3.2 GHz Uncore clock.
However, this is already overclocking, because Intel does qualify Bloomfield only with DDR3 up to DDR3-1066, not even DDR3-1333 is allowed.
Proof:
Memory Types DDR3-800/1066
http://ark.intel.com/Product.aspx?id=37153
Now it seems that the multiplier for Gulftown is lowered to 1.66, but maybe this is just an automatic setting. Check the uncore clocks with DDR3-1066, if you want to verify.