Try going manual and a simple 5.0Ghz all core OC for your 8700K. You might like it.
Then try a simple 5.1Ghz ... and so on, and 5.2Ghz and so forth.
Copy and Paste and Print this page if you want, and Happy Overclocking!!!
This is Der8auer's 8700K overclocking step by step. He wrote it for ROG boards but can be easily adapted to other motherboards.
These settings are for the Asus bios. Der8auer does not say this but you can tell by his default settings he FIRST set bios to "Load Optimized Defaults" and applied/saved out and then rebooted back into bios.
1-Ai Overclock Tuner to XMP, then select NO to all core enhancement in the Notice window. Apply by saving out of bios and reboot back into bios and make sure your memory is running at your individual memory's XMP settings, in Asus bios that information is located at the right side information bar
2-Asus Multicore Enhancement to Disable
3-AVX Instruction Core Ratio Negative Offset to 3
4-CPU Core Ratio to Sync All Cores and 1-Core Ratio Limit Multiplier to 50 (for the first 5.0GHz overclock attempt). Scroll down and all 6 Cores Ratio Limit will change to 50
5-CPU SVID Support to Disable
6-Drop into External Digi+ Power Control (opens a new window) Set CPU Load-line Calibration to Der8auer says 5 or 6, I used 5. (5 seemed like a more conservative number than 6 LOL)
7-ESC out of Ext Digi+ Pwr Cntl back to the Extreme Tweaker window, select Internal Digi+ Power Control this time (opens a new window) and set Long Duration Power Limit to 55555 (4095) and Short Duration Power Limit to 55555 (4095)
8-ESC out of Int Digi+ Pwr Cntl back into the Extreme Tweaker window and set CPU Core/Cache Current Limit Max. to 55555 (255.50)
9-Min CPU Cache Ratio to 42 and Max CPU Cache Ratio to 42
10-BCLK Aware Adaptive Voltage set to Disable
11-CPU Core/Cache Voltage to Manual, and for CPU Core Voltage Overide type in the value 1.350volts for your 8700K/8086K that should be good for the first 5.0Ghz overclocking run.
12-Go into Asus Overclocking Profile and save your settings in Profile 1 (if you wish). Then APPLY all these settings SAVE OUT of bios and boot into Windows
Der8auer is using Cinebench and CPUID and Core Temp to set up his stability testing screen, so I did exactly the same thing.
Those (3) apps/programs are FREE to download.