Laptop Requirements for Sims 3 Expansions

@jenn_sims1  The newer U-series processors can sometimes be managed by tweaking Windows's power settings.  (Of course this is with the laptop plugged in and able to properly cool itself.)  But the 6500U is older, dual-core, and not nearly as powerful as 8th-gen or newer Intel CPUs.  It's also dual-core, meaning those two cores will need to carry the load for Sims 3, Windows, and anything else you run while you play.

There are people who play on an Nvidia 940MX and do fine.  They certainly don't use the highest graphics settings, and most of them don't install Pets or Seasons (or they use Seasons but disable rain and snow).  I've seen other people try to play on the same card and have a lot more trouble.  So I can't really give you a good answer on that—a lot of it is your expectations for quality gameplay and the packs you want to use, and some of it is random.

I'm sorry I can't offer anything more definitive.  Sims 3 is more difficult than it should be to run on medium hardware, and it's not always clear why.  I don't want to tell you that this laptop will be fine and then have you barely be able to play at all.  On the other hand, you might be one of those who has a good experience.  In your position, I'd try to find something with at least a 1050, or a 960M or higher, just to be safe.  But it's your decision.