Having recently started playing with an Intel system after many years with AMD PC's, I was trying to find out what the actual Voltages were, when using the different LLC levels in the BIOS on my GA-Z68X-UD3P-B3 motherboard and came across this information which might prove helpful to others who are interested, especially when it comes to trying to tweak your system.
LLC disabled = 1.296v at Idle & 1.192v at Load
LLC Level 1 = 1.296v at Idle & 1.200v at Load
LLC Level 2 = 1.295v at Idle & 1.224v at Load
LLC Level 3 = 1.308v at Idle & 1.248v at Load
LLC Level 4 = 1.320v at Idle & 1.272v at Load
LLC Level 5 = 1.332v at Idle & 1.308v at Load
LLC Level 6 = 1.332v at Idle & 1.332v at Load
LLC Level 7 = 1.344v at Idle & 1.368v at Load
LLC Level 8 = 1.356v at Idle & 1.404v at Load
LLC level 9 = 1.368v at Idle & 1.404v at Load
LLC Level 10 = 1.368V at Idle & 1.415V at Load
This graph is one from Gigabyte that gives a graphical representation of the above information. Sorry about some of the colours used which makes it very hard to see some of the scales but there's nothing I can do about that.
From the information I have it seems that the same voltage settings for LLC apply to all of the Intel motherboards with LLC control
