Overclocking on the BIOSTAR HiFi Z87X 3D is very straightforward especially if you are running Intel Core i7-4770K processor on it. In our test, we were able to POST the system even at 49 x 100. The system is stable at 4.6GHz (46 x 100) with the memory running at XMP profile #1 at C11-13-11-30-2T. The Vcore was up at 1.25v, vdimm 1.65v, the rest are auto.
The same effect can be achieve if you use the TOverclocker software supplied.