@bff611 The crash log analyzer is often inaccurate or overly general, as you can guess from its current conclusion. Your graphics card is more than capable of running Sims 3 on ultra settings, but the game engine itself has some limitations that might be coming into play here.
First of all, have you manually limited your in-game framerates? This is a critical step in getting Sims 3 to run well on high-end systems. The Nvidia Control Panel settings may be sufficient here, which would mean you don't need to install a third-party program, so let's start with that. Right-click your desktop and select the Control Panel, then Manage 3D Settings > Program Settings and find ts3.exe (without the W) on the list. Scroll down to Max Frame Rate and set it to 165, the refresh rate of your laptop screen. Scroll down to Vertical Sync and set it to Adaptive, then set Triple Buffering to On.
Open Sims 3 and confirm that the fps limit is being honored. Bring up the cheats console (ctrl-shift-C) and enter "fps on" without quotes, and you'll see a number in the upper-right corner of the screen. This should never exceed the 165 fps limit you've set in the Control Panel; please let me know either way.
Additionally, please either play in windowed mode or in fullscreen mode but matching the current resolution your screen is using, which is 1680x1050. Playing in fullscreen with a resolution that has a different aspect ratio than your monitor can cause stuttering and other graphical issues.
As a side note, is there a particular reason you're running your screen at 1680x1050 rather than its much higher native resolution? If the icons and text are too small at 2560x1600, you could increase the system DPI scaling instead, which would allow you to benefit from the higher resolution. Let me know either way and if you'd like help changing the DPI setting.
Please test the game in a clean user folder. Move the existing Sims 3 folder out of Documents > Electronic Arts and onto your desktop, and when you open the launcher, a clean folder will spawn with no content. Your saves and other content will be intact in the folder you've moved but not read by the game, which is the point at the moment. It's best to start with no added content at all and only reintroduce mods and the like once the game is stable.
If Sims 3 crashes again, please remove Reshade entirely and repair the game: open the EA App game library, click Sims 3, and select Manage > Repair. This will undo any changes you've made to the program files, including those in the guide you've followed. This is exactly the point of repairing: if restoring the user files to default doesn't help, the next step is restoring the game to default too. Please don't make any changes after repairing; just test the game again and let me know how it goes.
