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What is the full load frequency of 13900K?

sblantipodi
Beginner
1,726 Views

Hello,

What is the full load frequency of 13900K?

 

I have seen that some people says that the 13900K boosts to 5.5GHz on Pcores and 4.3GHz of Ecores, some other people says 5.2GHz on Pcores and 4.1GHz on Ecores.


I have disabled all the "additional boosts" that comes with the motherboard and when running cinebench my CPU sits at 5.2GHz/4.1GHz.


Is this normal?

Why some people does 5.5GHz/4.3GHz during cinebench ?

 

on the products specifications there are a lot of frequency but it's not clear to me what is the real full load frequency under a bench like cinebench.

 

https://www.intel.it/content/www/it/it/products/sku/230496/intel-core-i913900k-processor-36m-cache-up-to-5-80-ghz/specifications.html

 

 

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megan3000
Valued Contributor I
1,682 Views

This is the info about CPU frequency:

Performance-core Base Frequency > 3.00 GHz

Efficient-core Base Frequency > 2.20 GHz

 

Anything higher would be the result of turbo boost active and working on the CPU... For turbo boost, the max frequency that could be achieved are:

Performance-core Max Turbo Frequency > 5.40 GHz

Efficient-core Max Turbo Frequency > 4.30 GHz

https://ark.intel.com/content/www/us/en/ark/products/230496/intel-core-i913900k-processor-36m-cache-up-to-5-80-ghz.html

 

There is no guarantee on how much time the CPU would stay on the higher turbo boost frequency, nor guarantee if it will achive the max turbo frequency... different factors has a role in the CPU achieving higher frequencies...

https://www.intel.com/content/www/us/en/support/articles/000007359/processors/intel-core-processors.html

 

therefore, there is no guarantee that 2 CPUs same model will have same results on benchmarks...

https://www.intel.com/content/www/us/en/gaming/resources/read-cpu-benchmarks.html

 

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n_scott_pearson
Super User
1,669 Views

Good response Megan!

I would add that the number of cores that are active plays a significant role in the achievable max turbo boost frequency. The more cores active, the lower the achievable turbo boost frequency. While it's true that, in BIOSs that support it, you can configure for higher turbo boost frequencies with more cores active, power utilization and processor core temperatures will (still) be limiting factors for the amount of time that the cores can stay at these frequencies.

...S

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sblantipodi
Beginner
1,656 Views

Thanks for all the answers, I appreciate it but I sincerely don't understand these numbers.

 

What is the case when a 13900K could operate at that frequency?

 

When we talk of base frequency:

Performance-core Base Frequency > 3.00 GHz

Efficient-core Base Frequency > 2.20 GHz

if I have 100°C on the CPU with all cores at 100% load I can go higher than that frequency,

so what is the base frequency and when I could hit the base frequency?


If the max turbo boost is 

Performance-core Max Turbo Frequency > 5.40 GHz

Efficient-core Max Turbo Frequency > 4.30 GHz

why there are some people that goes even higher at 5.5GHz on PCores during cinebench (a full load test)?

 

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n_scott_pearson
Super User
1,643 Views

Look, you are not going to get numbers out of us. There are simply too many criteria that come into play and can limit if/when/what you can achieve and for how long you can achieve it.

If you are seeing temperatures in the vicinity of 100c - which is typically the Maximum Junction Temperature (Tjmax) for the processor - there isn't a chance in hell that you will be seeing any Turbo Boosting going on at all. One of the most important criteria is thermal headroom. If you are already at Tjmax, you have zero headroom. Further, if you are at Tjmax, active throttling of processor performance is going to be going on to protect the processor from thermal damage.

Those people have BIOSs that support the configuration of these Turbo Boost frequencies and they have adjusted the frequencies higher - and have provided far-better-than-average cooling solutions and lots of power.

I am done with this conversation. Obviously, you have not gone off and read any of the pertinent documents and, frankly, I am not going to do your homework for you.

...S

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sblantipodi
Beginner
1,618 Views

Scott it's now clear why you are a Retired Employee xD

calm down my friend, enjoy your life :D‎

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