CPU testing (Ryzen 3600 vs 7800X3D) with 1.0.18 numbers

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Nov 6, 2023
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Hey folks. I've been doing a little bit of rough performance testing and thought I'd share some results as it could help people make decisions regarding upgrades. I recently upgraded most of my PC, except the GPU (I'm waiting until January to see what new cards come out of CES), so it gave a good opportunity to look at the difference CPU alone can make (ok, also RAM and storage, but mostly CPU), especially going from a mid-range 2019 CPU to the highest end gaming CPU of 2023. Hopefully it's of some use to folks

These are only basic tests, jotting down an average FPS and Sim Speed from the developer inspector in two areas of my city (168k): outside a train station as a train arrives and castle ruin on the edge of the map.

I have 3 sets of numbers available that test the CPU and the effect of the 1.0.18 patch:

Setup 1: Ryzen 5 3600, 32GB DDR4 3600, Gen 3 SSD, RTX 2070 Super, Patch 1.0.15
Setup 2: Ryzen 7 7800X3D, 32GB DDR5 6000, Gen 4 SSD, RTX 2070 Super, Patch 1.0.15
Setup 3: Ryzen 7 7800X3D, 32GB DDR5 6000, Gen 4 SSD, RTX 2070 Super, Patch 1.0.18

All of these are run at 1440p with most settings set to Medium or High (except the usual performance tanking culprits being turned off)

At the train station I got the following numbers for the Sim Speed and FPS (just as the train let out passengers).

Setup 1Setup 2Setup 3

As you can see, this is very GPU-limited. Going from a 3600 to a 7800X3D did help improve the Sim Speed but didn't affect the frame rate. 1.0.18 has had a massive impact though, with the frame rate during the most intense period doubling and Sim Speed being nearly at ideal speeds. Again, this is with the same GPU in all 3 setups so this is purely down to CPU and fixes in the patch. It's also worth noting that when the train station isn't letting out a load of passengers I'm getting 30-40fps and the Sim Speeds are pretty much ideal

And speaking of ideal scenarios, the Castle Ruin has very little going on, just some trees and a few cars going by. This is where we start to get CPU limited and shows where a CPU upgrade can really help, even if your GPU stays the same.

Setup 1Setup 2Setup 3

Hopefully this is useful to someone if you're looking to upgrade in terms of how much emphasis to put into CPU vs GPU
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Good contribution.
I have a borrowed City of 340k Cims.
Yesterday I had speed simulation x1 = 0.35 with V1.0.15
Today has risen to 0.55 with V1.0.18

In my city Tampere, 265k cims, I have not yet come down from 0.99 still.

Ryzen 9 5900X, 32GB RAM, RTX 4070 TI, SSD M2 1TB.
Without VSYNC, without motion blur, without DoF, without resolution scale.
High quality settings by default. Resolution 1080p.
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