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SMT causing high CPU Temp

Question asked by smartie on Apr 8, 2020

Hi there!

 

I experienced something really strange on my quite new 3900x setup:

Only enabling SMT causes significantly higher CPU temperatures (The 3900x is running @ 4.2GHZ on all cores).

I noticed that running Folding@home. With SMT enabled - of course all cores are nearly 100% utilized - I end up with ~ 86°C Coretemp.

Running the exact same thing with SMT disabled, it's only 70°C.

Somehow this doesn't make any sense to me. For sure SMT might add some load to the cores, but THAT much? For a feature which honestly does not have much benefit in most of the cases?

 

What do you think?

 

Regards

smartie

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