Syxarp Yes, that's what Crin was asking for. I've moved your post to the PC tech section since it seems more like a performance issue and because your dxdiag has a pile of errors that point to a potential system issue. Are you getting BlueScreens while playing Sims 4, or in some other specific context, or do you not know when they happen? They're definitely happening; the question is in what context.
As for the game itself, do the problems only occur when you introduce or have your sims start interacting with a gemology table? As in, if you never use this feature, do your saves work fine indefinitely?