What is your Vcore set to? Mine was set to auto and you can keep it that way, but it might be giving it too much voltage and it will just be wasted energy and more heat would be output by your CPU.
If you have a decent aftermarket heatsink, then you could get away without touching the Vcore and just the clock speed, just make sure to benchmark it with Intel Burn in Test(about 10-20 minutes) and Prime95(run for 4-8 hours) to make sure it is stable, if you encounter any blue screens or freezes/random reboots, then you have to up the voltage if you set it manually or it's at stock voltage.