sindel :
So what I do to improve perfomance?
It may be possible to change the BIOS settings related to TURBO boost so that the 1-core, 2-core, 3-core and 4-core loads are all MULTIPLIER values of "x39".
I'm not familiar with the BIOS layout but I had something like that for my i7-3770K which is set to "x44" all cores. I don't believe you need a "K" series to do this, but the top value you can choose is "x39" for 3.9GHz.
It's only going to improve applications by a maximum of 5% though but still go for it.