Beyond just downloading a pack, you need to ensure your PC is ready to handle FiveM at a high level.
Regularly delete the cache folder in your FiveM Application Data. Old data from different servers can cause major stuttering. Step 3: FiveM In-Game Settings for "Extra Quality" fivem fps boost pack extra quality
Using smarter formats that take up less VRAM but still look sharp. Beyond just downloading a pack, you need to