sarahmoonblade Yeah, it wouldn't be ideal anyway but is clearly not helping here. I was hoping there would be a balance where you could play the way you wanted without crashes, OR that we could say that downclocking the CPU wasn't helping. And it sounds like the latter is the case.
Just to make sure though, you're changing the maximum, right? The minimum wouldn't do anything.
Aside from that, it would be worth doing some hardware monitoring to see whether anything else is happening on the hardware side that should be addressed. (And of course the logging should happen with the CPU power on default settings.) Please download hwinfo from here:
https://www.hwinfo.com/download/
You don't need to install anything; just choose the Portable version, unzip it, and launch it from Downloads or wherever you like. If you do want the full installer, be sure to click the button for hwinfo itself, not for lansweeper.
Restart your computer, open hwinfo, choose Sensors Only, and click the button that's a sheet of paper with a + to start logging. Save the log file to your desktop for easy access. Wait five minutes, then open Sims 4 and play until it crashes. Don't alt-tab out of the game or run any other programs, aside from the EA App of course, while you're testing. When you're done, click the same button to stop the logging.
Please upload the log to the third-party filesharing site of your choice (Google Drive, Dropbox, etc.) and link it for me. Either leave it in .csv format or, if you're going to use OneDrive, create a .zip file, and don't open the log before uploading it, or else my log reader might not be able to interpret it.