The 7700k is known for overclocking to 5.0ghz very easily. With most z200 series boards coming pre-configured to overclock to 5.0ghz easily, its not a surprised it’s a highly sought for processor. Each processor purchase can vary greatly in power consumption needed to maintain a 5.0ghz overclock.
You can play the “silicon lottery” and purchase 7700k from any retail vendor with the hopes of getting good clocks at lower voltages. Or you can purchase a 7700k from Siliconlottery.com that has been pre-tested and delidded.
Gigabyte has released an Overclocking guide for Kaby Lake which is located here.
What is Delidding?
Delidding is a process in which the top lid of a processor is removed, and the thermal grease is removed. Intel is known for using lackluster thermal paste on their Die, so replacing with Coollaboratory Liquid Ultra Thermal grease has reported temperature decrease of 12c-25c under FULL load. Delidding is, in my opinion, mandatory if you’re attempting to overclock to the 5.0ghz range. If you’re attempting to overclock without delidding, your results will definitely vary but do not be disappointed if you hit a heat ceiling very fast.
Power Options Disabled
Following Gigabytes guide, I disabled Intel Speed Shift Technology, C1E, C3 State Support, C6/C7 State Support, and C8 State Support.
CPU Vcore Loadline Calibration is important. Kaby Lake Processors do not hold a steady voltage, it is constantly changing. The higher you adjust this setting, the more aggressive the Voltage gains will be. For my 7700k, I used the “High” setting. I then adjusted my CPU VCORE to 1.3V. Which for 5ghz is below average. Booted into windows first attempt, Opened temp monitors and stress tested the processor using realbench. If you get a blue screen of death or your computer freezes, restart and give it some more power. A perfect test is 8 hours, so your water loop has time to heat up and you can record a good analysis. I ran this for 1 hour and my results were:
Although i set the voltage to 1.3, you can see vcore loadline calibration still giving it more juice when needed. 1.356 would be the max it received under load. 74c being my highest temperature. For 5ghz @ 1.3v, this is a VERY good chip. Definitely much better than some unlucky cases that I’ve seen. A lot of different experimentation was done to get to this point. Although this is a very simple adjustment of two settings, I attempted different voltages with different Loadline calibration and this is DEFINITELY the sweet spot. There is room beyond the 74c to go further but I have chosen to stay at 5.0ghz on this 7700k for a while. I’m sure i’ll get the itch within a week to go farther and weigh the results. Remember at specific points, if you’re having to dump a ton more voltage to gain 100mhz, it’s most likely not worth it.
Monitoring temperatures throughout this process is extremely important. Do NOT allow the processor to steadily stay over 90c. You will be consistently degrading the lifespan of the processor. Do not be afraid to dive right in and start testing your PC. This is an overclocking friendly chip and is well known for reaching 5.0ghz. What are your clocks, voltage and temperatures? Let me know below!