Intel NUC NUC8CCHB processor limited to 1.1Mhz?

[ARigo]

Hello,

According to the technical specifications, the NUC8CCHB has an intel celeron N3350 processor : https://ark.intel.com/content/www/us/en/ark/products/95598/intel-celeron-processor-n3350-2m-cache-up-to-2-4-ghz.html

This processor has a base frequency of 1.1Ghz and a burst frequency of 2.4Ghz. However it seems our board never get over the 1.1ghz frequency even when performing computational heavy tasks.

Is there anything we should do in order to use the full possibility of the processor?

[n_scott_pearson]

Please download and run the Intel Processor Diagnostic Tool and attach the log file to a response message using the paperclip icon below.

...S

[ARigo]

Hello, sadly I can' t run the tool as the oit ses we are using on the board is Ubuntu 16.04 and it seems the tool is not compatible with linux.

[n_scott_pearson]

The ability to boost core clocks is dependent upon a number of factors, most important of which are the temperatures of the various cores. Please run something that will give you a continuous display of the core temperatures (and better, supports logging) and then run your "heavy tasks". If the processor is approaching its Tjmax (maximum junction temperature), then boosting is not going to be available.

...S

[AndrewG_Intel]

Hello ARigo

Thank you for posting on the Intel® communities.

Regarding your inquiry, it is worth mentioning that Burst frequency is the maximum single-core frequency at which the processor is capable (meaning this a possibility) of operating and it is an embedded technology in the processor, a feature strictly of the processor, and it is dynamically enabled for short periods of time by the processor when needed. There are no user/Operating System/BIOS settings available for control options.

This design is intended to save energy and protect from overheating as the processor is not running at the burst frequency in idle or when not using high workloads. However, this is a power-saving design and different factors may have an impact and Burst Frequency may not be achieved even under 100% load due to processor temperature, type of workload, power consumption, environment, platform design, etc.

We hope this helps to clarify your inquiry.

Regards,

Andrew G.

Intel Customer Support Technician

A Contingent Worker at Intel

[AndrewG_Intel]

Hello ARigo

We are checking this thread and we would like to know if you were able to review our previous post as well the one from n.scott.pearson. We hope the information provided helped to clarify your inquiries.

Regards,

Andrew G.

Intel Customer Support Technician

A Contingent Worker at Intel

[ARigo]

Hello,

We have monitored the temperature during a CPU load of around 85% and:

• The temperature was at a stable 33°C
• The CPU frequency never went over 1.1Ghz

We looked a bit into linux hardware configuration files and it seems the CPU limit is taken directly from the BIOS. However it is not possible to change the CPU limit in the bios itself...

[Ronny_G_Intel]

Hi everyone,

I am just adding a clarification note: burst frequency is not configurable, meaning that there is no switch in BIOS and cannot be forced, this feature usually available in Pentiums*, Celerons* allows the processor to run at a higher clock speed than advertised, but only for a short period of time. It is activated automatically when the CPU is on a high load.

I hope this helps.

Ronny G