Sims 4 Keeps Bricking Laptop - Unable To Close / CTRL + ALT + Delete

Hey all! I just got a brand new ASUS ROG laptop to play TS4 through a combo of Steam / Origin. Everything is new - a fresh, clean install of TS4 / TS4 Add-Ons, and the OS and the drivers are up to date. But after about 10-20 minutes of gameplay in the CAS menu, the game will freeze everything on the computer except the music. The in-game audio will continue playing until the track finishes, but the screen, keyboard, & mouse remain unresponsive (even with using CRTL + ALT + DEL), and the only way out is to shut down power on the laptop manually and restart.

Any idea what might be causing this? I've never had a game unable to terminate before. And I'm pretty sure the hardware should be more than capable of running TS4, so this is rather confusing. I've attached a DxDiag as well, if it helps!