There are THREE i7-4770 model processors:
i7-4770K (Unlocked Multiplier so you can OverClock)
TDP = 84Watts @ 3.5GHz
i7-4770 (Regular version - No Overclocking)
TDP = 84Watts @ 3.4GHz
i7-4770S (Lower power, cooler, lower clock speed, no overclocking)
TDP = 65Watts @ 3.1GHz