@lindhard1234 Sorry for the late reply. I'm not sure where your thread was before, but it looks like it was only moved to a Sims 4 section today.
Anyway, you should be able to play on ultra graphics settings, that is as long as your laptop is holding up overall. Please start by updating the driver for your Nvidia card. You can download the newest driver here:
https://www.nvidia.com/Download/driverResults.aspx/176524/en-us
Select the custom option and check the box to "perform a clean install." Restart your computer after the driver is installed.
If that doesn't help, please set Windows to run Sims 4 in high-performance mode. Hit Windows key-i, select System > Display > Graphics settings, click the Browse button, and add TS4_x64.exe. Click on it, select Options, and choose "High performance."
If that doesn't help either, please test in a clean user folder. Move the entire Sims 4 folder out of Documents\Electronic Arts and onto your desktop, and when you launch the game, a new folder will spawn with no content. Don't add anything to this folder yet, and don't change the settings; just start a new save and see whether you get any lag. If you do, please let me know the context: what's happening in-game, how long you've been playing, and what else is running on your computer.