Adirtylittlepig Please update the drivers for your GPUs. The Intel driver doesn't need to be up to date, but your version is from 2018 and may not play well with Windows 11 or a current Nvidia driver. Your Nvidia driver is over two years old, which is fine for Sims 3 itself but not necessarily for Windows and everything else that's still updating. Here are the newest drivers:
https://www.intel.com/content/www/us/en/products/sku/134906/intel-core-i78750h-processor-9m-cache-up-to-4-10-ghz/downloads.html
https://www.nvidia.com/en-us/drivers/details/245673/
Install the Intel driver first, restart, and then install the Nvidia driver and restart again. Run each installer as an admin: right-click the download and select "Run as administrator." You may need to reapply the fps cap afterwards, so check before opening Sims 3.
Please test a new save in Sunset Valley and let me know what kind of performance issues, if any, you see. Please test with no mods or custom content at first. If it's easier, you can move or rename the existing Sims 3 folder in Documents > Electronic Arts to allow the game to generate a new one with no content. Then you can delete the new one and restore the old one when you want to restore your user data.
The idea here is to set a baseline for performance, then explore further from there. If the game runs great in SV with no added content, you can start testing the mods and cc you want to use, or try a different world, but not at the same time—keep things simple for now. If you do see a performance issue, we'll know it's not about your added content and can look elsewhere.
I understand that Sims Medieval is also a problem, and it wouldn't use any of the Sims 3-related content, but it's such a different game, and one that I don't deal with normally, that I don't want to make any assumptions or skip any steps in testing.
