How to improve FPS in The Sims 4 (PC)
The Sims 4 runs on a proprietary Maxis engine that's more than 10 years old, and it shows: the game is practically single-thread despite EA having added partial multi-core support over the years. In practice, performance depends far more on your CPU's per-core frequency and on the state of your install (packs, Custom Content, mods) than on having a powerful GPU. The number one cause of FPS drops, stutter while building, and eternal load times isn't graphics: it's the buildup of thousands of unorganized Custom Content (CC) files, corrupted caches, and a neighborhood overloaded with simulated Sims. This guide focuses on cleaning up and optimizing that layer before touching any graphics setting.
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Calculations based on our FPS model combined with the % gain of each setting (measured in public benchmarks).
1. Quick wins (no visual loss)
Start here. Each one adds a little, but together they give +63% free FPS.
Rebuild the Thumbnail Cache
The localthumbcache.package file accumulates CAS, build, and CC thumbnails over the years and frequently gets corrupted or grows to several GB. A corrupted cache slows down menu loading, entering Build Mode, and Create a Sim. Deleting it is safe: the game regenerates it automatically on next launch.
Audit and Organize Custom Content
Unlike other games, in Sims 4 CC doesn't just consume VRAM: every .package file is scanned at startup and many affect textures loaded in real time during play. Installs with 5,000-20,000 unorganized CC files are the most common cause of low FPS reported by veteran players.
Object Culling / Lot Detail Level
In open neighborhoods (like Willow Creek or Del Sol Valley) the engine keeps rendering objects from neighboring lots even when you're not on them. Lowering lot detail reduces this load without affecting your active lot.
Dynamic Fog / Depth of Field
These are among the few heavy post-process effects in the Sims 4 engine. They add little to day-to-day gameplay and their cost is disproportionate on low-end or integrated GPUs.
Display Mode
Sims 4's native fullscreen mode has known memory-management issues in long sessions, especially when repeatedly entering and exiting Build Mode. Borderless windowed mode avoids these cumulative micro-stutters.
2. Medium impact settings
Here's where most of the FPS is. Minor visual impact, major performance impact.
MC Command Center (neighborhood management)
The engine simulates all Sims in the neighborhood in the background, and this load grows with playtime and population mods. MCCC, the game's most popular unofficial mod, lets you cap how many Sims are actively simulated.
World Population Limit
The more households and active Sims exist in the world, the more AI and needs calculations the game's single main thread processes. In saves spanning several years, this is one of the silent causes of progressive slowdown.
Mod Audit (clear and reintroduce)
Not all mods are equally well optimized: some scripts run every game tick. The clear-and-reintroduce method is the most reliable way to identify which specific mod is dragging down performance.
GPU Drivers After Each Pack
Every major expansion modifies shaders and lighting. Outdated drivers generate FPS drops or glitches specific to the latest update, not the hardware itself.
Clutter and Decorative Objects
Sims 4 doesn't batch small objects for rendering as well as modern engines: every chair, plant, or decorative item is an individual draw call. Houses built with hundreds of detail objects generate noticeable stutter.
3. Upscaling (DLSS / FSR / XeSS)
The biggest gain in the game. Compatible with almost any modern GPU.
4. Tips by GPU
NVIDIA
- •Force the "Prefer Maximum Performance" power mode in the NVIDIA panel for Sims4.exe, since the game sometimes doesn't request the GPU's maximum performance because it's poorly optimized for modern APIs.
- •Enable Threaded Optimization in the control panel even though the game is mostly single-thread: it helps spread driver load on systems with many active script mods.
- •Don't force DSR/supersampling except on very powerful systems: being a 2014 engine, the cost of rendering at a higher resolution doesn't pay off against the visual gain.
AMD
- •Disable Radeon Chill for Sims4.exe: the game alternates between load spikes (Build Mode) and low-load moments, and Chill can generate micro-stutters by aggressively lowering the clock.
- •Use Radeon Image Sharpening at a low value if you play at above 1080p; it compensates for the lack of a native upscaler in the game's engine.
- •Check that the system power mode isn't set to Balanced on laptops with a dedicated AMD GPU: Sims 4 often runs on the iGPU by default if the power profile doesn't force the discrete GPU.
Sistema
- •Prioritize a CPU with high per-core frequency over a CPU with many cores: Sims 4's main simulation thread remains the dominant bottleneck, even in 2026.
- •Install the game and, above all, the Mods/CC folder on an NVMe SSD: with thousands of small .package files, the difference in load times between HDD and SSD is several minutes per session.
- •Close the Origin/EA App overlay and any mod manager running in the background while playing: they consume CPU cycles on the same thread competing with the game engine.
5. Known game issues
Corruption of localthumbcache.package with heavy CC installs
With large Custom Content installs, this cache file can grow to several GB and get corrupted, causing Create a Sim and Build Mode load times of several minutes, plus random crashes when saving. The fix is to delete it manually; the game regenerates it.
Memory leak in long Build Mode sessions
Repeatedly entering and exiting Build Mode during a long session causes a progressive rise in RAM usage that EA hasn't definitively fixed in any version of the engine, degrading framerate until the game is restarted.
Performance drop after accumulating several seasons in the same world
Saves with many years of played time accumulate simulation data that progressively slows down the main thread, regardless of hardware. Mods like MCCC mitigate the problem but don't fully eliminate it.
6. Frequently asked questions
Why does The Sims 4 give me low FPS if I have a powerful GPU?▾
How do I manage my Custom Content without losing performance?▾
What CPU do I actually need to play The Sims 4 well?▾
Do gameplay mods like MC Command Center lower FPS?▾
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Calculate FPS for The Sims 4 →Calculations based on consensus of technical sources and our own FPS model. More about our methodology →