This is exactly as I expected. Load-Line Calibration is essentially a vDroop control, and what you discovered is that having it Enabled reverses vDroop and results in vRise. This means that the full-load voltage is higher than the idle voltage. So, disabling LLC allows for vDroop to do its thing just as Intel has designed which means the full-load voltage ends up being lower than the idle voltage. That is why I said earlier that you will need to increase the voltage when you disable LLC in order to achieve the same full-load voltage that you had before when LLC was enabled. It's a compensation.
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Fortunately, raising the voltage setting in the BIOS does not mean that there is a higher voltage going through the CPU. The actual voltage is the voltage you see in CPU-Z, so that's why the temps aren't any different.
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In other words, what you experienced is normal because you didn't increase the voltage enough at first in order to compensate for the vDroop that is being allowed to occur by having LLC disabled. There's nothing wrong with that because it's good to experience it like that (at least, that's how I feel about it).
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So, as long as your full-load voltage is now back to where it was at when you had LLC enabled, your stability should be the same as it was.