Question One CPU core much higher than others?

[mole125]

Core #2 much higher than others, raising overall package temps. Is this normal? 5800x3d

Cores 1-8 averaging around 40 while browsing, core #2 at 60

 

[Lutfij]

Welcome to the forums, newcomer!

What are you using to cool that processor? Make and model of your motherboard? BIOS version for your motherboard?

You could use Curve Optimizer, though.

 

[hotaru.hino]

Core #2 much higher than others, raising overall package temps. Is this normal? 5800x3d

Cores 1-8 averaging around 40 while browsing, core #2 at 60

AMD processors have something called a "preferred core" which is a factory set thing. This is the core that can boost the hardest, so it's natural to provide it with all the work first. There's also supposed to be another core so that it shares which core gets the brunt of the upfront work so the preferred core gets some downtime.

From this Reddit post:

Now we’re at the handoff to the OS. This is where things get more complicated. Windows selects and prioritizes the fastest core in the firmware with an additional criterion that there must be a second core in the same CCX that’s nearly as fast. The scheduler rotates between them to ensure one core isn’t shouldering all the single-threaded work all the time. (This is why you will sometimes see a “one thread” task jump back and forth between two different cores.) Additionally, I believe it’s now widely understood in this community that corralling workloads within a CCX, when possible, is optimal for “Zen 2” performance. Windows 10 May 2019 Update also respects this. So, if Windows is going to pick and use a fastest core, it needs a partner within the same CCX to ensure all the criteria are met for optimal performance. This is the best-performing configuration for 1T and lightly-threaded scenarios.

 

[mole125]

Welcome to the forums, newcomer!

What are you using to cool that processor? Make and model of your motherboard? BIOS version for your motherboard?

You could use Curve Optimizer, though.

Hi there!

I'm using the Thermalright frozen notte 360 with a B450 tomahawk max, and what I believe is the most recent bios as I only upgraded about 3 months ago.

Although since I posted this my temps have returned to somewhat normality with no explanation as to why. I was mainly asking as I thought that could be the reason for an overall high temp.

 

[mole125]

AMD processors have something called a "preferred core" which is a factory set thing. This is the core that can boost the hardest, so it's natural to provide it with all the work first. There's also supposed to be another core so that it shares which core gets the brunt of the upfront work so the preferred core gets some downtime.

From this Reddit post:

This makes a lot of sense as even though my temperatures have dropped significantly for some reason, its core #0 and core #2 that seem to be around 6-7 °C higher than the rest.

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