Struggling with fluctuating voltage gigabyte z390 9700k

ToreAA

ToreAA

ToreAA

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Hey guys

I have overclocked my 9700k to 4.9 Ghz for a stable 24/7 overclock.
I have set vcore to 1.32 v to be safe, but actually delivered volt to CPU is fluctuating between 1.2v to 1.41v. I have looked at several guides and I followed them to get a stable oc, but there seem to be a build in fluctuation vcore voltage. In latest bios I cant find a setting for adaptive or static as it had before.

Can someone please help me to get a static stable vcore around 1.32v?
 
you'll need to head into the bois and find a setting called llc (load line calibration) this will stop the cpu voltage fluctuating under load, it will be listed from 1 - 8ish and because you have a beefy oc on the cpu i'd say a setting of 6 or more would be advisable.

have a look in your manual and once found head into the bios and you should find it.

failing that what motherboard have you got, i'll have a look and guide you best i can to find the setting
 
wookiee87 said:
you'll need to head into the bois and find a setting called llc (load line calibration) this will stop the cpu voltage fluctuating under load, it will be listed from 1 - 8ish and because you have a beefy oc on the cpu i'd say a setting of 6 or more would be advisable.

have a look in your manual and once found head into the bios and you should find it.

failing that what motherboard have you got, i'll have a look and guide you best i can to find the setting
Click to expand...
Thanks for your reply. LLC I have set to High, going from standard to ultra extreme. I think i was recommended to set it to high or turbo. Anyway I though the higher I set it the more voltage could potential be added, so in an attempt to reduce high vcore spikes, I sat this to high, but hoped to be able to reduce it even more.
But if I understand you right, you say set it higher for less voltage fluctuation, is that right?

I have z390 arous master, with 3700mhz 4/8 Gb ram, and I hope to reach 5 ghz, but for now im happy to get a stable 4.9 ghz. After 4 days use it seem very stable, no temperature issues experienced, but Im worried about spikes to 1.41 vcore

Its a little frustrating that after latest bios update the bios layout have changed a lot and some settings is removed, other added, and most guides is based on older version of bios.
 
llc wont add voltage it will reduce vdroop under load when a overclock is applied, with voltage spikes yes 1.41v is high but 1.45v the max safe voltage intel recommends for 24/7 overclock use, yes its always best to run at the lowest voltage possible, but this is where the silicone lottery comes in, if you are lucky enought to get a golden chip then your laughing all the way to the bank, in most cases you'll get a decent chip that will clock high but at the cost of more volts.

you may find your cpu needs 1.41v to operate at 4.9ghz and not crash, try reducing the voltage until you hit instability, at this point you know you can increase until stable, play around with the llc settings and find the happy medium, looking online and a setting of high or turbo are recommended for overclocking.

you've updated the bios and things have changed around and setting removed, it'll be a case of trial and error, which is annoying, i've always ran asus stuff and yes things change in the new bios but nothings taken away that i could see
 
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Ok thanks for the clarification on LLC, I thought it worked different.

Hmm after checking some more, I maybe have read voltage on cpu wrongly. Im using HWmonitor and HWinfo64 to track voltage on cpu.
In this monitoring tools both have CPU VCORE and individual core VID stats. Checking closer I see VCORE is between 1.25-1.33v, but VID on each core is fluctuating between 1.2-1.41v and is changing continuously.

After reading more up on this, my understanding now is that VCORE is actually delivered voltage, and VID is what the cpu is asking for.
The question then is if this is right, and if so, should I just ignore VID on each core?
 
in your case yes if vid is what the cores are asking for it can be ignored as the main voltage is the vcore, with overclocking its always best to use the least possble that way you can run the overclock for longer and not hit high temps, basically try and prelong the life of the chip, overclocking done not right can in some cases kill the cpu outright.

rest asured that your overclock looks good, maybe head into the bios and set a more agressive llc as the vdroop is a bit high (1.33v down to 1.25v under load) ideally vdroop shouldn't happen (eg set 1.33v then with the droop should be around 1.3v ish under load just for stability under very high cpu load) set your llc from hight to turbo.
 
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