stuttering

@FlipzSenapi  Please run a dxdiag and attach it to a post.

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

Please also let me know what kind of framerates you're seeing both when the game is stuttering and not.  You can enable the built-in fps counter with the cheat "fps on" (without quotes).  A number will appear in the lower-left corner, over the user interface.  I don't need exact numbers, just a general idea of the behavior.

So i usually get an average or 90 to around 110 but it dips to the 60 and sometimes even as low as 30 and I usually play on medium high settings

@FlipzSenapi Is your power supply 500W or grater? Ideally you want your video card to match your monitor. Your monitor native refresh is 60 Hz and your video card is 144 Hz. What you should try is set the Nvidia driver to 60 Hz refresh.and see if that helps.

@FlipzSenapi  What is your current patch level?  You can see it in-game at the Main Menu, in the lower-right area.  I ask because the most recent Windows error in your dxdiag lists patch 1.86, and the current version (as of yesterday) is 1.88.

Is there any pattern to the stutter, for example when you're playing on a certain lot, or it's a certain time in-game, or you or your sims are doing anything specific?  Do you play any other games, and if so, how do they run?  It's fine if you don't; I'm just curious.

Your graphics card should be able to run Sims 4 at higher than 110 fps, at least in a new save, so if you don't have any other games to compare, please start a new save in a new user folder as a baseline.  Move your entire Sims 4 folder out of Documents\Electronic Arts and onto your desktop, and the game will spawn a clean folder with no content.  Don't add anything to it yet; just start a new save, specifically in one of the base game worlds, and see how it runs both in terms of fps and stutter.  When you're done testing, you can trash the new Sims 4 folder and put the old one back.

@roberta591  The monitor itself is running at 144 Hz.  While it's technically an overclock, there's no reason to think that this would cause fps drops and also no reason to lower the refresh rate.  The GPU is capable of hitting 144 fps in Sims 4 anyway.

@puzzlezaddict The monitor has a native mode: 1920 x 1080(p) (60Hz) - the video system should match the device. In this case the monitor is receiving more frames then it is displaying. While this may not be an issue, it should be corrected (eliminated) as a possible cause.

"Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth." Sir Arthur Conan Doyle - Sherlock Holmes

@FlipzSenapi Here's what the dxdiag says -

 Monitor Name: Generic PnP Monitor

       Monitor Model: LG ULTRAGEAR

          Monitor Id: GSM5B72

         Native Mode: 1920 x 1080(p) (60.000Hz

Actually that monitor is capable of 240 Hz refresh. with Nvidia G-Sync.and the graphics card is set at 144 Hz.  This could be because there is a driver for the monitor which does not seem to be loaded. Normally this shouldn't matter because most system run at 60Hz. With higher resolutions and refresh rates your graphics system needs to know the capabilities of the monitor hence a device driver. Also the quality of the HDMI cable comes into question. Do you have a high speed HDMI cable?. I fount one spec that said the HDMI ports are version 2.0 - LG doesn't list the version of HDMI ports. This could affect your settings.

add: here is a driver for that monitor - LG driver 

@FlipzSenapi  It's possible that this issue is just Sims 4 being its usual less-than-optimized self, but if you'd like to do some hardware monitoring, I'd be happy to take a look at a log.  Download hwinfo from here:

https://www.hwinfo.com/download/

You don't need to install anything; just choose the portable version, unzip it, and launch it from Downloads or wherever you choose.  (If you do want to install it, be sure to click the button for hwinfo itself, not for lansweeper.)  Restart your computer, open hwinfo but no other applications, choose "sensors only," and click the button that's a sheet of paper with a + icon to start logging.  Wait five minutes before launching Origin and Sims 4.

Please play for at least 20 realtime minutes, and test in one of the base game worlds for at least the first ten minutes.  (If you change worlds, let me know when you did so relative to when you opened hwinfo.)  You can click the same button to end the logging.  Please upload the log to a third-party site (Google Drive, Dropbox, etc.) and link it here.  Leave the log in .csv format, or if you use OneDrive, zip it before uploading.

I'd also be interested in the power supply in this computer.  Please list its full specs, for example Corsair 750W 80+ Gold; you can find this info on the side of the unit.

@roberta591  The "current mode" in a dxdiag refers to the monitor's current mode, no the graphics card, as in, the monitor is running at 144 Hz.  The graphics card is not "set at 144 Hz" or anything of the sort.