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Different cores on i3-N305

Gaaf
Beginner
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Hi,

 

When I stress test my N305 processor, I noticed that the first 4 cores stay noticeable cooler (12°C) than the last 4 cores. The datasheet suggest all cores should be equal E-cores, but that doesn't seem to be true. Can somebody explain this difference?

The CPU frequencies of the cores are all the same around 2.9-3.0GHz.

Load is generated with:

$ stress -c 8
stress: info: [2501572] dispatching hogs: 8 cpu, 0 io, 0 vm, 0 hdd

The resulting temperatures:

20240315 Temperature (coretemp-isa-0000) on router1.png

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그래요ITech
New Contributor I
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Hi friend, Gaaf

 

The temperature differences you're observing in your N305 processor during a stress test could be attributed to several factors. Even though the datasheet suggests that all cores are equal E-cores, in practice, there can be variations in temperature across different cores due to:

1.Silicon Quality: Not all cores are created equal; some may be able to handle higher frequencies or voltages more efficiently than others.
2.Workload Distribution: The stress test might not be distributing the workload evenly across all cores, leading to temperature disparities.
3.Thermal Solution: The effectiveness of the cooling solution can vary across the processor, with some areas being better cooled than others.
4.Sensor Accuracy: Temperature sensors themselves can have slight variances in accuracy or calibration.

 

It's also possible that the first four cores are positioned in a part of the chip that has better thermal conductivity to the heatsink, or they might be less affected by other heat-generating components on the motherboard.

If this temperature difference is consistent and not causing thermal throttling or stability issues, it might be within the expected operational parameters.

 

Regards,

Max

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