How to Overclock NVIDIA GTX 660 GPU in Windows 10: A Step-by-Step Guide - Reedablez

Overclocking a graphics card, like the NVIDIA GTX 660, can be a powerful way to boost your gaming performance without breaking the bank on a new GPU.

To overclock your NVIDIA GTX 660 GPU in Windows 10, download an overclocking utility like MSI Afterburner, create a system restore point for safety, and gradually increase the core and memory clock settings while stress testing in small increments. Fine-tune your settings for optimal performance, monitor temperatures, and save profiles for future use.

In this guide, we'll take you through the process step by step, ensuring that you maximize your GPU's potential while maintaining the safety and stability of your system. So, whether you're a gaming enthusiast or a power user, it's time to unleash the full potential of your GTX 660 and experience a performance boost like never before.

What is Overclocking?

Before we delve into the steps, it's crucial to understand what overclocking means. Overclocking pushes your GPU's clock speeds and memory beyond their stock specifications. This process aims to increase performance, allowing for smoother gameplay and improved graphics. However, it also generates more heat and power consumption, necessitating caution and proper cooling.

Precautions Before Overclocking

  • Backup Data: Before you begin, it's wise to back up your critical data. While overclocking is generally safe when done correctly, there's always a small risk of instability or crashes.
  • Monitor Temperatures: Keep a close eye on your GPU's temperature. Overheating can lead to damage or instability. Use monitoring software to track temperature levels during the overclocking process.
  • Update Drivers: Make sure your GPU drivers are up to date. Manufacturers often release updates that optimize performance and address known issues.
  • Stress Testing: After overclocking, stress-test your GPU to ensure it remains stable under heavy loads. Unigine Heaven or FurMark are popular stress-testing tools.
  • Patience: Overclocking is an iterative process that requires patience. Start with conservative settings, gradually increasing them to balance performance and stability.

Steps to Overclock Your NVIDIA GTX 660 GPU

Step 1: Download and Install Overclocking Software

To overclock your NVIDIA GTX 660, you'll need a reliable overclocking utility. MSI Afterburner and EVGA Precision X are popular choices. Download and install your preferred software.

Step 2: Create a System Restore Point

Before making any adjustments, create a system restore point. This will allow you to revert your system to its previous state in an unstable overclock.

Step 3: Open Overclocking Software

Launch the overclocking software you installed in step one. You'll see sliders for the core clock and memory clock settings. These sliders are used to adjust the GPU's clock speeds.

Step 4: Start with Conservative Settings

To avoid potential issues, start with conservative settings. Increase the core clock and memory clock sliders by a small amount. For example, a 25 MHz increase is a reasonable starting point.

Step 5: Stress Test

After making these adjustments, apply the settings and stress test your GPU. Use a tool like Unigine Heaven or FurMark to ensure stability. Monitor temperatures during the test. You can proceed to the next step if the test completes without crashes or artifacting.

Step 6: Gradual Increment

Now, it's time for gradual increments. Increase the core and memory clock settings in small steps, typically 10-25 MHz. Apply the changes and stress test after each adjustment. Keep an eye on temperatures and stability.

Step 7: Find the Sweet Spot

Continue this process of incremental increases and stress testing until you reach the point where your GPU shows signs of instability. This could manifest as screen artifacts, crashes, or elevated temperatures. Once you reach this point, you've found your GPU's sweet spot.

Step 8: Fine-Tuning

At the sweet spot, it's time to fine-tune your overclock. Try small adjustments in both directions to ensure optimal performance without instability.

Step 9: Maximize Power Limit and Voltage (Optional)

You can sometimes maximize performance further by increasing the power limit and voltage. However, this requires in-depth knowledge and should be done with caution. Not all GPUs support voltage adjustments, so consult your GPU manufacturer's guidelines.

Step 10: Save and Apply Settings

Once you're satisfied with your overclock settings, save them as a profile in your overclocking software. This allows you to revert to your stable settings if needed easily.

Step 11: Monitor Temperatures

After you've applied your overclock, monitor your GPU's temperatures during regular usage and gaming. Make sure it doesn't exceed safe limits.

What precautions should I take before overclocking my GPU?

Before embarking on the journey of overclocking your GPU, you should take several crucial precautions to ensure a safe and successful process. Overclocking, while a great way to boost your GPU's performance, can be risky if not approached with care. Here are the essential precautions to consider:

Backup Your Data

Before you begin overclocking, it's wise to back up all your important data. While overclocking is generally safe when done correctly, there is always a small chance of instability or crashes that could lead to data loss. By having a backup, you'll have peace of mind.

Update Your GPU Drivers

Ensure that your GPU drivers are up to date. Manufacturers frequently release driver updates that improve performance and address known issues and potential compatibility problems. Updated drivers provide a solid foundation for your overclocking endeavors.

Create a System to Restore Point

This is a critical step. Before making any adjustments, create a system restore point in your Windows operating system. A restore point allows you to revert your system to its previous state if you encounter instability or problems during overclocking. It's like having a safety net.

Monitor Temperatures

Overheating is one of the primary risks associated with overclocking. High temperatures can lead to performance throttling or permanent damage to your GPU. To avoid this, monitoring your GPU's temperatures during the overclocking process is essential. Use monitoring software to keep track of temperature levels.

Use Reliable Overclocking Software

Choose a reputable and reliable overclocking utility that is compatible with your GPU. Popular choices include MSI Afterburner, EVGA Precision X, and ASUS GPU Tweak. These tools provide a user-friendly interface and offer essential features for GPU overclocking.

Understand Your GPU's Limits

Every GPU has its own limits, and not all GPUs of the same model will overclock the same way. Understanding that the potential for overclocking varies from one GPU to another is crucial. Some might overclock more than others due to factors like manufacturing variances. You may need to experiment to find your GPU's limits.

Start with Conservative Settings

When you begin overclocking, it's important to start with conservative settings. Conservative settings involve making small adjustments to the GPU's core and memory clock. These initial adjustments serve as a baseline to gauge your GPU's tolerance for overclocking.

Stress Test Your GPU

After applying even the smallest overclock, you should stress test your GPU. Stress testing involves running demanding applications or specialized tools to determine if your GPU can handle the overclock without crashing or producing artifacts. Tools like Unigine Heaven and FurMark can help with this process.

Observe for Stability and Artifacts

During the stress testing, pay close attention to your GPU's stability. Stability means your GPU can maintain the overclocked settings without crashing or freezing. Additionally, watch for artifacts on your screen. Artifacts can appear as visual glitches, lines, or distortions and indicate instability.

Gradual Incremental Changes

When you're ready to proceed, make incremental changes to your GPU's core and memory clocks, typically in small increments of 10-25 MHz. A stress test should follow each adjustment. This gradual approach helps you find the optimal balance between performance and stability.

Watch Temperatures During Stress Tests

While stress testing, closely monitor your GPU's temperature. Overclocking generates more heat, so it's essential to ensure that your cooling solution can handle the extra load. A safe temperature range for most GPUs is typically below 80°C.

Find the Sweet Spot

Your goal in the overclocking process is to find your GPU's "sweet spot." This is where your GPU offers the best balance of performance and stability. You'll reach this point when further increases in clock speeds lead to instability or overheating.


You can fine-tune your overclock once you've found your GPU's sweet spot. This might involve making small adjustments in both directions to optimize performance without compromising stability.

Following these precautions and taking a systematic and cautious approach to overclocking can enhance your GPU's performance without unnecessary risks. Remember that not all GPUs are created equal, and finding the perfect overclock may require some experimentation and patience.


Overclocking your NVIDIA GTX 660 GPU in Windows 10 can be a rewarding way to enhance gaming performance without needing a costly upgrade. However, it should be approached with caution and a focus on safety. Following these steps and taking the necessary precautions can unlock your GPU's potential while maintaining system stability. Remember that not all GPUs are created equal, so your mileage may vary, and it's essential to find the overclock that suits your specific hardware best.

Frequently Asked Questions

Is overclocking safe for my GPU?

Overclocking is generally safe if done correctly and cautiously. It's important to monitor temperatures, start with conservative settings, and gradually increase clock speeds to find the optimal balance between performance and stability.

Can I damage my GPU by overclocking it?

While overclocking carries a slight risk of instability or overheating, careful overclocking within safe limits typically won't damage your GPU. By monitoring temperatures and following best practices, you can minimize the risk.

How do I know when to stop increasing clock speeds during overclocking?

You should stop increasing clock speeds when your GPU shows instability, such as crashes, screen artifacts, or excessive temperature increases. This indicates you've reached the limit of your GPU's overclocking capabilities.

Can I overclock my GTX 660 without increasing power limits or voltage?

You can overclock the GTX 660 without adjusting power limits or voltage. However, some users might choose to maximize performance further by increasing power limits and voltage settings, but this is an advanced technique and should be done with caution.

Can I overclock my GTX 660 GPU on Windows 10 laptops?

Overclocking is generally more common with desktop GPUs, but it's possible to overclock some laptop GPUs, depending on the manufacturer and model. However, laptops have limitations, so proceed cautiously and check for compatibility with your specific laptop.

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