[SOLVED] Core frequencies are fluctuating on load

[FuZeSeD]

My Specs -
CPU - I7-9700k stock
MOBO - Z390 A pro
RAM - 32 vengeance clocked to 3000
GPU MSI - 2070S
PSU - 600w Evga White plus
AOI - Arctic Freezer 2 240

In short - My core frequencies are fluctuating on load from an OC. I do not know why.

Longer version - I have a i7 9700k which I have Overlocked to 4.9 over its stock of 4.6 many times.

I had to remove the OC as my case and cooler could not deal with the CPU heat. I just got a new case and got a AOI so I can OC.

I OC the CPU to 4.9 using the default option to do that on the MOBO - I'm very used to doing it.

I OC to 4.9 and then once I was testing while gaming, using MSI afterburner, I can see my core frequency fluctuating on load, dropping back down to 4.6 then it would go back up to 4.9 and it just keeps on doing until its idle then its back up to 4.9.

I used Hwinfo64 and CPU z confirming the drops.

My Temps are stable and under 80c at all times - Mostly 60s to 70s tops.

I have tried manually OC to 4.9 and putting it on fixed and set my own votage to 1.25.

I can't work out whats going on, I don't see anything about overclocked cores dropping down to stock on load only.

Any help would be appreciated.

 

[FuZeSeD]

Wow this place is a waste of time.

 

[vMax]

What LLC have you set? I would re do the overclock from the start with a 4.9GHz overclock at a fixed 1.28v and a mid LLC setting. From here if stable into desktop run Prime95 blend, check temps. If okay drop vcore a tad and start again. LLC will have a baring to stop vdroop and thus stability issues..

 

[FuZeSeD]

What LLC have you set? I would re do the overclock from the start with a 4.9GHz overclock at a fixed 1.28v and a mid LLC setting. From here if stable into desktop run Prime95 blend, check temps. If okay drop vcore a tad and start again. LLC will have a baring to stop vdroop and thus stability issues..

Thank you for the response

The things I have tried is, overclocking to 4.9 and 5ghz, using Vcores such as 1.58 and even 1.37. Everything works fine as it is so if i do as you say and it works fine, it does not address the issue; as soon as i put a load on it, it will underclock back to 4.6.

I did a test today showing, if i put the voltage to Auto, it works! Most of the time, but the voltage went up to 1.4. which is the max for the chip and it overheated my temps going way over 80c on BF5. None of this never was an issue before i installed the new case and AOI, not that I was aware of anyway.

Can i ask what a LLC is and what would you recommend for LLC. Maybe that could be a game changer? I have run out of ideas... Maybe a new MOBO would solve it.

 

[vMax]

LLC, short for Load-Line Calibration, applies additional voltage, when needed, to the CPU to ensure a more stable vCore under load (closest to what you manually set), and minimise the gap between CPU voltage in idle and load. So LLC is the golden setting when looking for the perfect 24/7 CPU overclock.

You should be able to find the LLC settings in your BIOS under the OC tab. I do not have a MSI motherboard so not sure how to get to it.

Your motherboard should be okay so I would persevere a bit...It is on the low end but should still allow for a decent overclock, though a better mobo with a stronger VRM setup would be better.

My max limit on vcore is 1.35v but even then I prefer not to go over 1.3v for 24.7 use. Try again at 1.3v and find your LLC setting at set it in the middle to start with.

 

[FuZeSeD]

Thanks for the help.. I bought a new MOBO and now its holding, I can even run 50 ghz.. I could prob go higher, maybe 5.2 but i will just go back to 4.6. I did use a mini guild for the OC i have tested on the new Mobo but no matter what OC i used on the last Mobo it would not hold and it did for a year so... Must have been the Mobo.. Im running at 2.8 atm, I may try lower it soon but its only at 4.9.