kwohld Are you able to play? The newest errors in your dxdiag (1a8 and 1b8) aren't always indications of a significant issue, although they can be.
If Sims 3 is still crashing, AND you've confirmed that your in-game framerates are still limited (use the cheat fps on to check), it would be interesting to see how the game ran on the iGPU, without the Nvidia GPU present at all. Are you comfortable removing it from your computer? If so, do that and of course reconnect the monitor to the motherboard. The idea is to test whether the problem is limited to the Nvidia card and everything that goes with it or is more global.