olchaos Right, and the dxdiag says that components of the Nvidia driver aren't digitally signed, as in, the driver isn't WHQL, which would be strange for an Nvidia product that wasn't in beta. So there may be something wrong with the install of the driver.
Before doing anything else though, try forcing Sims 4 to use the Nvidia GPU. You can do so in the Nvidia Control Panel, if you still have it installed (as opposed to the Nvidia App). Right-click the desktop, select the CP, click Manage 3D Settings > Program settings, select TS4_Launcher_x64, and choose the high-performance option. Do the same for TS4_x64.
If this doesn't help, try doing a clean uninstall of this driver and installing a slightly older one. Here's how to clean-uninstall the driver:
https://crinrict.com/blog/2019/02/clean-re-install-of-graphics-drivers-with-display-driver-uninstaller-ddu.html
Just in case there's some issue with the newest driver, you can grab an older version here:
https://www.nvidia.com/en-us/geforce/drivers/
The one from March 5 should be fine, or a slightly older one, but make sure you're choosing a Game Ready Driver, not one of the Studio drivers.
Since you can always update to a newer driver by simply installing it, but you'd need to DDU a newer driver before installing an older one, it's best to start with an older version and work your way forwards if you're interested in testing multiple versions at all.
