Re: How to allocate more ram to sims 4?
@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.