VCore question

[blueherald]

When someone says that their processor is stable at 5Ghz at X voltage, or that you shouldn't go over X voltage for a 24/7 overclock, are they typically referring to the nominal voltage that they enter into the BIOS or the actual voltage at load as reported by CPU-Z or HWMonitor?

 

Differences in LLC settings, VRMs and PSUs can lead to a significant difference between idle voltage and load voltage. In my case, there is about a 30-40mV difference despite using the highest LLC setting.

 

Which measurement is more important? I assume that it is the voltage under load that matters since there is more current, but I want to make sure.

[suchamoneypit]

4 minutes ago, blueherald said:

When someone says that their processor is stable at 5Ghz at X voltage, or that you shouldn't go over X voltage for a 24/7 overclock, are they typically referring to the nominal voltage that they enter into the BIOS or the actual voltage at load as reported by CPU-Z or HWMonitor?

 

Differences in LLC settings, VRMs and PSUs can lead to a significant difference between idle voltage and load voltage. In my case, there is about a 30-40mV difference despite using the highest LLC setting.

 

Which measurement is more important? I assume that it is the voltage under load that matters since there is more current, but I want to make sure.

I would say the actual read voltage is more important (because this is obviously the one that'll damage your CPU), however when people give advice its almost always talking about the voltage you set in BIOS. There is always some variability for the voltage so this should certainly be kept in mind when recommending a voltage. However if that 30-40mv fluctuation is the difference between "ok to run" and "dangerous to run" then the voltage you set in the first place probably isnt safe anyways.

[Jurrunio]

vcore is more important,  and at least that's what I said when I say "do not go past X amount of volts"

[Crunchy Dragon]

1 minute ago, Jurrunio said:

vcore is more important,  and at least that's what I said when I say "do not go past X amount of volts"

Worth noting that 'X' is usually 1.5v

[Jurrunio]

8 minutes ago, Crunchy Dragon said:

Worth noting that 'X' is usually 1.5v

never heard of that before

[blueherald]

14 minutes ago, Jurrunio said:

vcore is more important,  and at least that's what I said when I say "do not go past X amount of volts"

So you mean VCore under load right?

 

51 minutes ago, suchamoneypit said:

I would say the actual read voltage is more important (because this is obviously the one that'll damage your CPU), however when people give advice its almost always talking about the voltage you set in BIOS. There is always some variability for the voltage so this should certainly be kept in mind when recommending a voltage. However if that 30-40mv fluctuation is the difference between "ok to run" and "dangerous to run" then the voltage you set in the first place probably isnt safe anyways.

Both my nominal and actual read voltage are within the safe zone. I have a 8700k and the voltage that I entered in BIOS is 1.365v. This is the lowest voltage that is stable at 5Ghz for Prime95.

 

On idle, VCore bounces between 1.360v and 1.376v, while it drops to 1.328v under full load. 

[Jurrunio]

1 hour ago, blueherald said:

So you mean VCore under load right?

 

not necessarily under load, but the maximum value reached

[UnaverageVague]

5 hours ago, blueherald said:

So you mean VCore under load right?

 

Both my nominal and actual read voltage are within the safe zone. I have a 8700k and the voltage that I entered in BIOS is 1.365v. This is the lowest voltage that is stable at 5Ghz for Prime95.

 

On idle, VCore bounces between 1.360v and 1.376v, while it drops to 1.328v under full load. 

On my 7700k I have my voltage set at 1.360v on adaptive mode usually see max of 1.424v

[DarkSmith2]

On my 8700k i set 1.25v in BIOS with LLC6,

in CPU-Z it shows 1.248-1.264v

 

If i would want to see max 1.248v in CPU-Z i would have to set 1.235v in BIOS. LLC6 does a little overshoot though, but still closest to the set voltage.