Ok,
I have the 12700KF and do my overclocking manually as well.
Your cooling will determine how far you can overclock. There are three things you can overclock on your 12700k, the P-Cores, the E-Cores and the CPU Cache.
You can do per core overclocking or sync all cores for an all core overclock, I do an all core overclock.
Because cpu's aren't created equal, my settings may or may not work for you, so it's basically some trial and error and testing. Be warned, too many blue screens will corrupt your operating system and you'll have to reinstall windows.
1) First, I set the AI Overclock Tuner to XMP to set my ram or you can set your ram manually as well. Test to see if it's stable with a demanding game.
2) On the AI Tweaker page, set the Global Core voltage to Manual.
3) A box will appear that says CPU Core Voltage Override. I have good cooling so I type in 1.44v and hit enter.
4) Scroll down to the Power Core setting, select sync all cores, enter in 51 and test with a game, if stable try the multiplier to 52 and test again. If stable, you can try the multiplier at 53, but this is unstable for me.
5) Scroll down to the Efficiency Core setting, sync all cores and enter in 40, if stable try the multiplier at 41, if stable try the multiplier at 42, this is unstable for me.
6) Scroll to CPU Cache VID voltage and select manual, enter in 1.35v in the cpu cache voltage override. For the cpu cache you select a minimum and maximum, set both to 44 and test. If stable, try the cache ratios to 45 and test, 46 is unstable for me.
7) Set SVID Behavior to Best Case Scenario.
😎 In the DIGI+ section set LLC to level 4.
Number 7 and 8 should help keep the voltage at or close to what you're setting in the bios.
Install a monitoring program such as HWinfo to monitor clock speeds, voltages and temps. Pay attention to the maximum voltages and maximum temperatures.
I ended up with....
P-Cores - 5200MHz all core overclock
E-Cores - 4100MHz all core overclock
CPU Cache - 4500MHz (Ring Clock = CPU Cache)
CPU Core voltage - 1.44v (Vcore is the cpu core voltage)
CPU Cache voltage - 1.35v
I try to avoid these stress testing programs such as cinebench, prime95 etc.. as they stress the cpu pretty hard. Temps will be high running these tests, especially with an overclock.
So, what I do is just use a demanding game for testing.
For the cpu cache ratio, set the Minimum to auto so it downclocks to 800MHz at idle.
Some bios screenshots:
I'm setting 1.44v for the cpu core voltage, maximum is going to 1.465v in Hwinfo. This is a little higher than I want to see for the maximum Vcore. I'll try with LLC at level 3 which is the default setting, this should bring down the maximum Vcore to 1.44v - 1.456v.
Here are my maximum temps when playing Destiny 2.
