Core Voltages and Load Line Calibration

Neil79

Neil79

Neil79

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I'm having trouble setting the right Volts and Load line levels, If i set a voltage of 1.350V and a level of 5 in bios it shows up as 1.40V!. In windows 7 using any voltage results for example easy tuner 6 it shows 1.368V.

What would I set for 1.38V for example?

Im testing 4.7GHZ/4.8GHZ
 
I am building a system at the moment for someone. i5. I have set vcore to 1.3v and I am stability testing at 4.5ghz. The thing is, I have noticed cpuz reckons vcore is 1.4v. I have turned load line calibration and PLL overvoltage control OFF as they were making it far worse and temps went way high with them on. I prefer the control of having them off, seems more stable the volts. I am not sure if it is other things in BIOS set to auto that accounts for it like PLL voltage (not over voltage).
 
I set 1.370 Volts with load line calibration OFF and it shows 1.41v in bios! which is too high so i turned it back to my original setting 1.350v Load Line level 5.

Seems i'm unable to get 1.38V and stay near that it's either too high in bios or vdroops to 1.36 :(
 
EDIT

Why don't you use dynamic vcore (DVID) also known as the Offset Voltage? I'm using it for my overclock 4.0GHz @ 1.260v. No vdroop and It's rock stable.
Click to expand...

Ahh so DVID = Offset, What should i set that too?
 
Find your load VID (coretemp) and then your DVID is +/- to make your vcore.

So say you wanted 1.4v vcore, and your VID is 1.38v (sandy chips usually sit between 1.37 and 1.41v VID) your DVID would be +0.020v.

In example for your case, you want 1.38v, you may only need a fine adjustment depending on your VID.

Don't worry if its confusing the life out of you at this stage, it took me a good few days and some wrong settings before I got put in the right direction :)
 
DVID = Gigabyte Dynamic Vcore. Vcore must be set to normal or DVID will not function. All C states and EIST etc must be enabled.

The idea is to 'find' the max Vcore necessary for stablity. Then 'know' what is the normal cpu voltage supplied by the board's bios. Not something you set but Vcore supplied automatically by board bios.

Then subtract default Vcore from the Max Vcore needed for stability. This resultant number is inserted as the DVID setting.

Thus DVID is NOT some arbitrary 0.1 or 0.4 setting but an actual value determined setting by testing and doing the math.
Click to expand...
 
Shouldn't that be the case anyhow as your going to be adjusting the vcore via the offset? (if you were to use the DVID option).

You could try translate clunks P67 guide for your board, explains what all the settings mean, albeit for an Asus board, struggling to find any decent GB P67/Z68 guides.
 
You should be able to use both?

LLC from what I understand prevents voltage spikes and compensates for some vdroop, for example my LLC is set to Very High (out of Disabled, Auto, High, V High, U high and extreme).

The way I found my offset was to find my lowest stable manual voltage, taking note of the VID and then subtracting to end up with my offset (-0.060v). Min Manual was 1.312v, the VID was 1.372v, so an offset of -0.060v gave me an offset voltage of 1.312v
 
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How would i find my lowest stable manual voltage?, do I boot up at default settings on auto volts?

Or should I just try +0.020v
 
Right avoiding the offset mode for a sec

With load line at level 6, 1.350v My volts during intel burn test are going up to 1.4v and dropping to 1.380v
 
You need to put your system under load at the desired clock first and take note of the VID (coretemp). You can do this under auto if you want, it will give you an idea of what is stable, then from there change the voltage settings to manual and drop slowly and stress test until your system becomes unstable (system hangs or BSOD) then put it up a notch.

You could try it your way, I don't see the harm in it, take a gamble (after you have found the VID) and adjust the DVID to match upto 1.4v, test stability and slowly drop the DVID. I started an offset at 0.000v so essentially running at the VID voltage and worked my way down.
 
ooops :p

0.0020v+ Load Line level 5, instant BSOD
0.0070v+ was giving me 1.205V in Bios, so i booted it up but at 3.3GHZ default speeds

It said " idle voltage 0.881V " and Load voltage in Intel Burn test " 1.181V " Instant System Shut off :(

Think i'll stick with LL
 
Np, hopefully someone with some GB experience will come along and give you a better push in the right direction :)
 
Crashes EVERY single time with Offset mode, even had it set to 1.356v as soon as I loaded prime instant BSOD. Yet 1.345V/LL Level 5 and it doesn't
 
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