How to allocate more ram to sims 4?

@Fernix93  Sims 4 will use as much memory as it needs in order to run properly, up to the limit of what the system can offer at the moment.  So as long as your computer isn't already using 28 GB RAM before you launch Sims 4, the game has access to all the memory it needs and isn't using more simply because it has no reason to do so.

What issues are you seeing in-game?  You mention lag, but that covers a lot of ground, including problems due to mods and excessively decorated lots and overly full sim inventories.  So please describe what you see.  Please also run a dxdiag and attach it to a post.

https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/

Hello, thanks for answering. I deleted all my mods but MCC, so that's the only mod I have Installed. I have some houses downloaded in my Tray but those are just like 5 so I don't think that's a big deal. This lag happens when I'm in big plots, but I  think it should me no problem bc of my specs. it's like tha game just freezes for some seconds and then goes back to normal continously. I had to move my sims to a smaller plot to avoid lagging.

@Fernix93  Do you own Eco Lifestyle, and if so, was the eco footprint on the large lot set to green?  Does it make a difference if you play on a lot set to neutral?  Do you see lag on a large lot in one of the base game worlds, with no lot traits?  Please test with a smaller house on a larger lot—you can place one meant for a 30x30 or so lot on a much larger one.  The problem could be less the size of the lot than the number of objects in the house.  Let me know what you find.

Please also make sure that Sims 4 is using your 1660 ti.  Open Windows Settings > System > Display > Graphics settings, click Browser, find TS4_DX9_x64, and select the high-performance option.  Do the same for TS4_x64, which is for the DirectX 11 version of the game, in case you want to switch to it as a test (or I ask you to).  And the laptop needs to be plugged in and charging while you play, or its power saving options may override your manually-imposed settings.

Yes, I've got eco lifestyle but the footprint was neutral. Playing in a plot with clean footprint made no difference. I loaded a smaller, less detailed house in the same plot and the lag disappeared. Idk if it has to do with the amount of objects that need to be loaded. I always make sure my games use the GTX 1660 Ti with the windows configuration you told me and with the NVIDIA Panel, so I'm sure my game is using it.

Simp4sims reduced the lag significantly, thanks for your help!

For some reason, idk why, the lag came back. What would it be? Here's footage of how I experience it.

Video in Google drive: https://drive.google.com/file/d/1LAvYNOtzHegWZlqoo5jUme0VMY5Hifkc/view?usp=sharing

@Fernix93  Does the lag only show up some of the time, or always?  I'm asking because I see rain in your video, and rain and snow definitely cause fps drops and other graphics-related performance issues.  As an example, I tested the RoM world a while ago and when it was raining rather than sunny, I saw around a 20% reduction in fps just looking around outside the easily-accessible community lot.  There was no other change: brand-new save, single sim, no other sims on-screen, no mods or custom content.

I tested changing the weather to rainy, snowy and then sunny, there was a slight difference, but nothing big. The lag seemed to disappear, but sometimes it comes back again.