Sims 4 game keeps crashing randomly

SerraNolwen  Please provide a new dxdiag, so I can take a look.

It's not unusual for a game to use as much VRAM as is available, in large part so that the player doesn't see any long wait times as new graphics assets are loaded.  The point is not that the game requires all that VRAM so much as it's attempting to be efficient.  Last I checked, Sims 4 did NOT behave this way, topping out at about 2.5 GB VRAM used on my gaming system, but admittedly it's been a while since I ran any rigorous tests.

I would be curious to know what program is showing Sims 4 using all your GPU's VRAM, and how exactly it's showing that, and whether that program shows the VRAM as being released after a crash.  It would be extraordinarily unusual for VRAM to not be released when the program closes, crash or not.