BTW, for those unaware:
Hyper-Threading basically works by splitting your physical cores (Most computers these days are Duo (2) or Quad (4) core) into double the amount as "Logical Cores" (so 2 becomes 4, 4 becomes 8 etc). This works by performing specific instructions super quick, assuming that certain programs have been optimised for Hyper-Threading.
Turbo-Boost means your CPU runs at a lower, cooler clock rate (that GHz number is your Clock Rate, which represents how many "CPU cycles" or instructions can be carried out in a second) until the Operating System demands more power, at which point it "boosts" up to its' full rate. It's designed to improve the life cycle of your CPU.