All I’m saying is just because you are maximising both components, does not mean you are getting the best performance in the sim - that’s the critical part here and the reason why this discussion started…
It’s pretty easy to cripple the CPU and GPU and have frames which absolutely suck but the hardware use would still be balanced. It’s literally only half the equation.
Take this hypothetical example
Two users have PC’s running an Intel i7-9600K with a 3090 but they’ve both achieved balanced GPU and CPU usage running at 95% each.
Clearly the CPU is a huge bottleneck and needs due consideration.
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User A likes traffic at airports and runs 80% global traffic in the sim. This increases the already massive load on the main thread so decides to super sample his 4K rendering to create the balance and ends up with 25 fps average.
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User B likes pretty graphics and lowers his traffic to 10% because his system was crippled on main thread, but understands the GPU can do more so turns up the rendering quality and to balance the components and ends up with 55 fps average.
So it’s not just getting the balance, it’s also making sure you are not wasting resources at the same time, especially if you have a component which is causing a bottleneck, you don’t want to make it any worst.