CPU going above set voltage?

[gundershot]

So, my CPU (4670K) keeps going above the set voltage in stress tests, even AIDA64 and XTU. Here are the settings in my Z97 Gaming 5 BIOS overclock tab:

 

 

There's a 1.272V to the left of the 1.250V, I'm not sure what it is. When I open CPU-Z and run a stress test, the voltage will exceed the set 1.25 volts, on the last test I did it went up to 1.28. AIDA64's monitoring displayed the same maximum voltage of 1.28:

 

 

Could this just be an inaccurate measurement by CPU-Z and AIDA64? If not, does anyone have any idea how to fix it? Maybe it's something to do with the PLL and SVID communication settings?

[Altecice]

when you are using stressing programs that activate the AVX code process the CPU adds 0.2v to the normal VCORE... unsure why it does this and it causes your temps to go crazy! (this is why people say only use Prime95 v26.6 or under for Haswell processors). But under normal stress situations the processor also gives its self more Vcore when operating in Turbo mode 4ghz+

[gundershot]

when you are using stressing programs that activate the AVX code process the CPU adds 0.2v to the normal VCORE... unsure why it does this and it causes your temps to go crazy! (this is why people say only use Prime95 v26.6 or under for Haswell processors). But under normal stress situations the processor also gives its self more Vcore when operating in Turbo mode 4ghz+

 

I heard that AIDA64 and XTU don't increase the voltage though?

[Altecice]

I heard that AIDA64 and XTU don't increase the voltage though?

 

I figure it just your Turbo activating and your processor adding some more vcore to make its self stable. my 4790k also does this. 

[gundershot]

I figure it just your Turbo activating and your processor adding some more vcore to make its self stable. my 4790k also does this. 

 

Turbo is turned off, actually. Could it be the PLL and SVID communication settings? I think I'll try AIDA64 without the FPU test when I get home and see if the voltages still go high. Do CPU-Z and AIDA64 accurately measure voltage though?

[Faceman]

You're always going to get some overvolting, often referred to as vBoost.  Its a result of LLC and adaptive voltage.  During stress testing you are always going to get more than in real-world scenarios.  To avoid this, set your voltage to manual/override/constant/static whenever stress testing, then revert back to adaptive when not stress testing.  Also, set your LLC to medium or 4/8, whatever your motherboard calls it.

 

Even for me running at 1.160v will see 1.170v when I'm gaming.  I use adaptive voltage and 3/8 LLC.

[gundershot]

You're always going to get some overvolting, often referred to as vBoost.  Its a result of LLC and adaptive voltage.  During stress testing you are always going to get more than in real-world scenarios.  To avoid this, set your voltage to manual/override/constant/static whenever stress testing, then revert back to adaptive when not stress testing.  Also, set your LLC to medium or 4/8, whatever your motherboard calls it.

 

Even for me running at 1.160v will see 1.170v when I'm gaming.  I use adaptive voltage and 3/8 LLC.

 

Yeah, I guess I'll just stop paying overvolting too much attention. I'm already turning off adaptive voltage for stress testing, but I'll give the LLC thing a try. Thanks for the suggestion

[Faceman]

Yeah, I guess I'll just stop paying overvolting too much attention. I'm already turning off adaptive voltage for stress testing, but I'll give the LLC thing a try. Thanks for the suggestion

Happy to help!  Yea, try turning LLC down to medium or however MSI identifies it.  I can tell you from personal experience, when I had LLC set to 8/8 I would experience vBoost as much as .800 with 4.7Ghz @ 1.275v.  LLC definitely has its place in your overclock settings, but be careful with it because it has the potential to cause a lot more voltage than you intend.  Here is an amazing article written by our forum's very own @Queek.  Load-Line Calibration and Overclocking