@ElDimentio I understand what you're saying, but if this were a universal problem, there would be a lot more complaints about it. So I'm trying to figure out what's different about your setup. It's obviously not that you have weak hardware, but maybe there's something else running in the background. Or maybe this would be fixed by uninstalling and reinstalling Sims 4, although that seems a bit extreme, and a repair is usually good enough.
The monitor being plugged into the motherboard will absolutely lower the overall performance of your system. I'm not talking about fps drops, I'm talking about lower fps overall than you'd otherwise see. How much lower will depend on the games involved and your motherboard, and as a practical matter, you might not notice any difference at all with a 2080 ti driving a 60 Hz screen. That really depends on the games you play. But what is absolutely true is that the graphics card passing data directly to the monitor is much more efficient than the card passing that data through the motherboard.
And again, this has nothing to do with Sims 4, this is something I saw in your dxdiag that I thought was worth mentioning.
