Benefits of plotting with more than 2 threads

I’ve been seeing a lot of people who are plotting with 4 or more threads. But personally I’n not seeing any real benefits.

I ran a test today (ryzen 9 3900X, 32GB, 2TB Gigabyte Aorus PCIe 4)

3 plots at the same time
1 with 2t, one 3t and one 4t
The difference between them in phase 1 was only about 16 minutes.
So the plot with 4 threads was only 32 minutes faster than with 2 threads.
And as I understand it the thread count only matters in phase 1.

Are people getting much bigger improvements than that going from 2 to 4 threads?

On my 5900X, there was a 30 minute difference from 2 threads to 4. But then, only a 5 minute improvement from 4 to 6. This was single plotting also, not parallel.


Ok yeah so that’s about the same as what I got, I wonder if there is anyone here who is getting more difference somehow.

Otherwise it really doesn’t seem to make much sense to me to use 4t per plot.

It all depends on the CPUs. Since we’re using higher-end AMD’s they have CCXs. Providing more threads than a single CCX is actually worse in our case. This is why a 5800X can single plot faster than the 5900X. That’s my theory on it at least. You can see my post here about it: Benchmarking Different Settings for K32 – The Chia Farmer

So if you get a monolithic CPU like a 11900K and run all cores with that, it will be comparable if not faster than the 5800X.

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