mycailin A 12700K and RTX 3070 are massive overkill for Sims 3. That doesn't mean you shouldn't buy them if you want them for other reasons, only that you'd be getting more power than the game could ever use. The game engine has its own somewhat severe limitations, and no amount of power on the hardware side can overcome them.
This isn't a question of the components being too advanced or anything like that. It's simply that Sims 3 is programmed in a way that it can't take advantage of the capabilities of high-end hardware.
If you're looking for a performance improvement, now or later, I'd suggest looking into DXVK for Sims 3. The idea is to allow the game to use more VRAM, rather than its default 800 MB limit, and allow more textures to be offloaded to VRAM rather than being in RAM. This certainly doesn't fix everything, but it does give the game more headroom.
Island Paradise is so broken out of the box that almost no one can play it. If you'd like to talk about how to fix it, just ask.
Thank you!!
