v355 Your dxdiag does show one problem, which is that you've plugged your monitor directly into the motherboard, rather than into the graphics card. Please plug it into the GPU; its ports are likely lower down on the back of the case. The GPU definitely has at least one HDMI port, which is what the monitor is currently using.
If you get another crash, please look for new errors in the Reliability Monitor. Hit Windows key-R and enter "perfmon /rel" without quotes, and you'll see a chart of errors and updates with a column for each day. Today is on the right.
Look for an error that happened at exactly the time of your most recent Sims 4 crash. If you find one, double-click it to see more details, then copy that info and paste it into a reply here. If you don't see a new error, check back in an hour or so—the Reliability Monitor doesn't always update right away.