No two processors are identical; each is unique in voltage tolerance, thermal behavior and overclocking potential, which is often referred to as the "silicon lottery". Dialing in your desired GHz then plugging in a certain Core voltage is not the correct approach. Instead,
the objective is to achieve the highest stable overclock without exceeding 1.400 Vcore or 80°C.
Start by reading several guides
before you attempt an overclock, so you have an understanding of what you're actually doing when you change certain settings, which will ensure that you don't damage your hard-earned components.
• Overclocking is always limited by two factors; voltage and temperature.
As Core speed (MHz) increases, Core voltage (Vcore) automatically increases to maintain stability. However, it's
not recommended to overclock using “Auto” BIOS settings, motherboard features or software utilities, as significantly more Vcore than necessary is applied to maintain stability, which needlessly increases Power and heat. It's instead
highly recommended to use only "manual" Vcore in BIOS. Overclocking guides will explain how it's done.
• CPU Overclocking Guide and Tutorial for Beginners
• Intel Temperature Guide
Here's the Maximum Recommended Vcore per Microarchitecture from 14 to 65 nanometers since 2006:
For your 7th Generation i7-7700K,
Core voltages above 1.400 are not recommended.
Here's the nominal operating range for Core temperature:
Core temperatures above 85°C are not recommended.
Core temperatures below 80°C are ideal.
Core temperatures increase and decrease with ambient (room) temperature, for which the International Standard (normal) is 22°C or 72°F.
You can also search Google for an overclocking guide specific to your CPU and motherboard.
CT