Custom pc just for Sims 4. Advice

@dinogirl93x  This parts list is well put together, for sure.  It's also massive overkill for Sims 4.  That's not a bad thing, exactly, but you could get essentially the same performance on cheaper hardware.  If you're also planning to play more demanding games, e.g. Hogwarts Legacy, that's another matter, but as far as Sims 4 is concerned, there are diminishing returns even a tier below this one.

That's not to say performance will be ideal.  Sims 4 lags on any system, no matter how powerful, a consequence of the game engine rather than the hardware running it.  Lag will resolve more quickly on faster components, at least up to a point, but nothing will prevent the lag in the first place.

As far as these parts go, the only thing I'd change for sure, regardless of whether you're keeping the rest of the build or are considering a downgrade, is the power supply.  Cooler Master's products aren't junk, exactly, but they're not high-end either, and the PSU is the single most important component of all.  I'd suggest getting a Corsair or Seasonic PSU instead.

For the memory, what you've picked out is great, but you'd get slightly better performance from modules with tighter timings, for example one of these (also cheaper):

https://pcpartpicker.com/product/x4VmP6/gskill-ripjaws-s5-32-gb-2-x-16-gb-ddr5-6000-cl30-memory-f5-6000j3040f16gx2-rs5k

https://pcpartpicker.com/product/LBstt6/gskill-flare-x5-32-gb-2-x-16-gb-ddr5-6000-cl30-memory-f5-6000j3038f16gx2-fx5

On the other hand, maybe you want RGB RAM, like one of these:

https://pcpartpicker.com/product/mjt9TW/corsair-vengeance-rgb-32-gb-2-x-16-gb-ddr5-6000-cl30-memory-cmh32gx5m2b6000z30k

https://pcpartpicker.com/product/CXKKHx/gskill-trident-z5-neo-rgb-32-gb-2-x-16-gb-ddr5-6000-cl30-memory-f5-6000j3038f16gx2-tz5nr

Latency is a combination of speed (6000 above, 6200 in the one you picked out) and timings (CL30 above, CL36 in yours), and it's often better to sacrifice a bit of speed to lower the timings.  The difference wouldn't be noticeable to the naked eye; it's just something to think about considering the higher-performing options are actually cheaper in this case.

Thank you I appreciate the help. I have one more question I happened to run into this gpu online. I can’t seem to find anything about it on the internet. I was hoping you could tell me if it’s worth buying. 

maxsun GeForce RTX 3060 Ti iCraft ACGN Limited Edition Video Gaming Graphics Card Anime GPU for Computer Gaming PC 8GB GDDR6X, RGB, Metal Back Plate, PCI Express 4.0 x16 HDMI 2.1 https://a.co/d/4mly86O

@dinogirl93x  A 3060 ti is still overkill for Sims 4, just not as much as a 4060 ti.  But given the very small price difference, the 4060 ti you picked out would be the better option.  Or you could go with a 3060 non-ti for as low as $250:

https://pcpartpicker.com/product/DXH7YJ/zotac-geforce-rtx-3060-12-gb-gaming-amp-video-card-zt-a30600f-10p

The 3060 ti starts at a lower price, and frankly, a higher quality, than the one you found as well:

https://pcpartpicker.com/product/9nkWGX/asus-dual-oc-geforce-rtx-3060-ti-8-gb-video-card-dual-rtx3060ti-o8gd6x-white

Even if the prices were the same, I would absolutely not buy the 3060 ti you linked.  It would probably be fine, but you don't know for sure, and dealing with an RMA through a Chinese company, with no apparent Amazon protections, could be a nightmare.  There are plenty of GPUs available from reputable companies that do a lot of business in the U.S., so no need to take even that small risk.