The only reason O/Cing was started years and years go was to make a less expensive lower speed CPU perform like a more expensive higher speed CPU.
Since the Processor manufacturers use to "Cull" their CPUs, the better ones being capable of higher speeds, sometimes O/Cing worked and at other times, it didn't work so well.
Now a days, due to manufacturing process improvements at the Fabs, all CPUs are more uniform in quality so the speeds are locked and the pricing structure is artificially controlled.
This same artificial control pricing is now used for pricing multi-core CPUs as they are more uniform in quality also.
The moral of the above is to purchase the Fastest Speed, Multi-Core, Most Cache, Least Core Affinity, Balanced Core Performance, Smallest Physical Size, Current / Future Socket CPU one can possibly afford - Forget the pretty LED fans and lighted cases (LOL) (LOL) (LOL). Next step up, Multi-CPU Machines. :) :) :)
My Opinion Only. :) :) :)