14900K - CPU Overclock/Temp Advice

[0121danwilliams84]

Hi all,

I have been able to successfully get a pretty decent overclock on my 14900K.

I noticed that my OC became unstable when I removed my CPU temp limit of 90c I had in place.

I imagine that the temp limit was keeping the OC stable as it didn’t push things like clock and power as high with this in place.

Has anyone noticed temp affecting OC performance in such a way?

I am trying to get the max stable performance but don’t fancy adding any more voltage as it is already about the maximum I feel comfortable with.

 

[Tetras]

Have you watched buildzoid's rambles on the subject?

Rambling about why some intel 13th/14th gen i9s and i7s aren't stable.

My Patreon: https://www.patreon.com/buildzoidTeespring: https://teespring.com/stores/actually-hardcore-overclockingBandcamp: https://machineforscreams.bandca...

www.youtube.com

 

[0121danwilliams84]

Have you watched buildzoid's rambles on the subject?

Rambling about why some intel 13th/14th gen i9s and i7s aren't stable.

My Patreon: https://www.patreon.com/buildzoidTeespring: https://teespring.com/stores/actually-hardcore-overclockingBandcamp: https://machineforscreams.bandca...

www.youtube.com

I did watch this actually. Will have to have another look at it as he does tend to ramble! I remember he did say that a temp limit can assist in stability. Thanks for the reminder.

 

[Tetras]

I did watch this actually. Will have to have another look at it as he does tend to ramble! I remember he did say that a temp limit can assist in stability. Thanks for the reminder.

Yeah, both temp and current/power limits help with that.

 

[momo56]

More likely your desired OC wasn't stable for sustained periods, temp limit throttled clocks down which is why it was fine.

 

[0121danwilliams84]

More likely your desired OC wasn't stable for sustained periods, temp limit throttled clocks down which is why it was fine.

That sounds like a probable reason thanks! Does seem to have highlighted that the OC wasn't quite stable enough.

 

[jabski]

That sounds like a probable reason thanks! Does seem to have highlighted that the OC wasn't quite stable enough.

could you increase your temp limit a few c at a time then test for stability

 

[0121danwilliams84]

could you increase your temp limit a few c at a time then test for stability

Thanks for the advice. I was thinking of going the other way and slightly lowering the overclock rather than adding voltage to remove the temp limit but that is also a good idea.

 

[jabski]

Thanks for the advice. I was thinking of going the other way and slightly lowering the overclock rather than adding voltage to remove the temp limit but that is also a good idea.

what overclock was stable before? You could set a fixed voltage and work from there

 

[0121danwilliams84]

what overclock was stable before? You could set a fixed voltage and work from there

I was using TVB to get 6GHz stable all core under 80C using an aggressive temperature offset. Seems to work well with the 90C limit, so probably needs more voltage. I have added +0.030V to voltage points 8,9 and 10 on the V/F curve that got me stable before removing the 90C temp limit. Other than that I am using auto voltages and LLC level 6 which gives 1.475V adaptive voltage. I have not used a fixed voltage yet in any testing.

 

[jabski]

I was using TVB to get 6GHz stable all core under 80C using an aggressive temperature offset. Seems to work well with the 90C limit, so probably needs more voltage. I have added +0.030V to voltage points 8,9 and 10 on the V/F curve that got me stable before removing the 90C temp limit. Other than that I am using auto voltages and LLC level 6 which gives 1.475V adaptive voltage. I have not used a fixed voltage yet in any testing.

I guess for 6ghz all core your running custom water cooling ?

 

[0121danwilliams84]

I guess for 6ghz all core your running custom water cooling ?

Yeah, x2 360mm radiators for the 4090 and 14900K