Tarkov Only Use Physical Cores On Or Off? The Ultimate FPS Optimization Guide

Escape from Tarkov is notorious for being one of the most CPU-demanding first-person shooters on the PC market. Because the Unity engine struggles with complex physical calculations, ballistics, and AI pathfinding, players are constantly searching for ways to squeeze every frame out of their hardware. One setting that has sparked endless debate in the community is the "Only use physical cores" checkbox found in the in-game graphics menu.

Understanding how this setting interacts with your specific processor is crucial to achieving smooth frame rates and eliminating micro-stutters. Depending on your CPU architecture, turning this option on can either be a game-saving FPS boost or a performance-destroying mistake. This comprehensive guide breaks down the underlying technology, analyzes different CPU behaviors, and provides a clear recommendation for your gaming rig.

Understanding the "Only Use Physical Cores" Setting in Escape from Tarkov

To understand what this setting does, you must first understand the difference between physical cores and logical processors (threads). Modern CPUs from both Intel and AMD use multithreading technologies—Hyper-Threading for Intel and Simultaneous Multithreading (SMT) for AMD. These technologies allow a single physical core to act as two logical cores, processing two tasks at the same time to improve productivity and multitasking workflows.

However, Escape from Tarkov relies heavily on single-thread performance and low memory latency. When SMT or Hyper-Threading is active, the game's engine often schedules critical render threads onto virtual/logical cores instead of physical ones. Because logical cores share physical cache and execution pipelines, this thread-sharing can lead to data bottlenecks, increased frame times, and severe micro-stutters during intense firefights.

Turning "Only use physical cores" ON instructs Escape from Tarkov to bypass these logical threads and bind its operations strictly to your CPU's actual physical silicon cores. In theory, this ensures that the game has direct, unhindered access to your hardware's processing power. In practice, the effectiveness of this setting depends entirely on your specific CPU generation and architecture.

Should You Turn "Only Use Physical Cores" On or Off? (Intel vs. AMD)

The impact of this setting varies dramatically depending on whether you are running an Intel or AMD system, as well as how old your processor is.

AMD Ryzen Processors (Zen, Zen 2, Zen 3, and Zen 4)

For standard AMD Ryzen processors (such as the Ryzen 5 3600 or Ryzen 5 5600X), keeping "Only use physical cores" ON is generally recommended. AMD's SMT scheduling can sometimes cause thread migration across different Core Complex Dies (CCDs), which increases latency. Forcing the game to use only physical cores minimizes this latency.

However, if you own an AMD X3D processor (like the Ryzen 7 5800X3D or Ryzen 7 7800X3D), you should turn this setting OFF. These processors feature a massive 3D V-Cache that offsets memory latency issues. Benchmarks show that these chips handle thread scheduling exceptionally well, and forcing physical-only cores can actually lower your maximum potential FPS.

Intel Processors (Older Generations vs. Hybrid E-Core Architectures)

If you are running an older Intel processor (9th Gen or older, such as the i7-9700K or i7-8700K), turning this setting ON often stabilizes frame times and reduces stutters.

For modern Intel CPUs with a hybrid architecture containing Performance Cores (P-cores) and Efficient Cores (E-cores)—such as the 12th, 13th, and 14th Gen i5, i7, and i9 series—you should turn this setting OFF. The in-game Tarkov setting does not interact well with Intel’s Thread Director. If toggled on, it can accidentally relegate game tasks to the slower E-cores, causing massive performance drops. For these systems, it is better to manage core affinity externally or leave the setting off entirely.

Direct Performance Comparison: On vs. Off

The table below illustrates the typical performance trends observed across various CPU configurations when toggling this setting.

Step-by-Step Guide: How to Configure Your CPU for Tarkov

Because the in-game toggle in Escape from Tarkov can sometimes be unreliable or reset after a game update, follow this guide to ensure your CPU is running the game optimally.

Step 1: Configure the In-Game Setting

1. Launch Escape from Tarkov and open the Settings menu.
2. Navigate to the Game tab.
3. Locate the checkbox labeled Only use physical cores.
4. Check or uncheck the box based on your CPU architecture (refer to the section above).
5. Click Save and restart your game to ensure the changes apply cleanly.

Step 2: Enable Windows Ultimate/High Performance Power Plan

Windows power management can park physical cores or downclock them to save energy, which harms Tarkov's performance.

1. Press the Windows Key, type "Control Panel", and press Enter.
2. Go to Hardware and Sound > Power Options.
3. Select High Performance or Ultimate Performance (if available). This prevents your CPU cores from entering low-power states mid-raid.

Advanced Alternatives: Using Process Lasso for Perfect Optimization

The in-game Tarkov setting is notoriously buggy. Many players report that the setting "forgets" to apply when transitioning from the main menu into a live raid. To solve this permanently, gaming enthusiasts use a third-party CPU affinity manager called Process Lasso. This tool bypasses Tarkov's internal settings and forces your operating system to handle scheduling correctly.

How to set up Process Lasso for Tarkov:

1. Download, install, and run Process Lasso (the free version works perfectly for this).
2. Launch Escape from Tarkov and load into the main menu.
3. Alt-Tab out of the game and open the Process Lasso window.
4. Locate EscapeFromTarkov.exe in the Active Processes list.
5. Right-click the process, hover over CPU Affinity, and select Always.
6. Select Disable SMT (for AMD) or Disable Hyper-Threading (for Intel). Alternatively, you can manually uncheck all odd-numbered logical cores (e.g., Core 1, 3, 5, 7) to ensure only even-numbered physical cores are utilized.
7. For hybrid Intel CPUs, use this method to completely uncheck all E-cores, forcing the game to run exclusively on your high-performance P-cores.

Frequently Asked Questions (FAQs)

Does "Only use physical cores" increase FPS in Tarkov?

Yes, for older Intel processors and standard AMD Ryzen processors, turning this setting ON can increase average FPS and significantly improve your 1% low FPS, resulting in a smoother gameplay experience. However, it can decrease performance on newer Intel hybrid CPUs and AMD X3D CPUs.

Why does the setting reset or stop working mid-game?

Escape from Tarkov's engine sometimes fails to apply the physical core limit when transitioning from loading screens into a raid. Some players work around this by toggling the setting off and on again in the options menu once they spawn into a match, though using Process Lasso is a more permanent and automated solution.

Should I disable Hyper-Threading/SMT in my BIOS instead?

While disabling SMT or Hyper-Threading in your motherboard's BIOS will force physical core usage globally, it is not recommended. Doing so will severely hurt your PC's performance in everyday tasks, video editing, and other modern games that are optimized to use all available virtual threads. It is better to restrict threads on a per-game basis using Process Lasso or the in-game setting.

Does this setting affect CPU temperatures?

Generally, no. Forcing the game to use physical cores does not increase your CPU's thermal output. In some cases, because the virtual threads are idle, you might see a minor drop in overall CPU package temperatures.

Maximize Your Raid Performance

Achieving stable frame rates in Escape from Tarkov is the difference between winning a high-stakes firefight and losing millions of rubles of gear to a sudden micro-stutter. Optimizing your CPU cores is one of the most effective, free performance upgrades you can perform.

If you want to take your tactical edge even further, combine your CPU optimizations with a high-speed SSD installation, at least 32GB of high-frequency RAM, and optimized in-game graphics settings. Turn off physical cores if you run modern hybrid or 3D V-Cache hardware, turn them on for standard architectures, and conquer the streets of Tarkov with buttery-smooth performance.