CPU stuck at 30% during large computation task

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Occasional Visitor

Hello

When apply a apply a resource heavy formula to a table with autofill, excel does not use more than 30% CPU. The load is split between 4 cores with 2 logical processors each. CPU load jumps up and down for all 8 processing units.
It looks like this when running:

silasdp_0-1610392515891.png

 

Settings is set to multi threading enabled and gfx disabled.
I have also tried disabling multi threading, with no change in cpu performance.

 

The formula includes arrays (sumproduct) and will run for 5-6 hours. I would like that to get down to 2 hours.

 

Any idea of why I'm experiencing this poor cpu performance with excel?

Thank you in advance

/Silas

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