OCCT is the gamer's favorite app for stress testing their PC or Steam deck components and check for errors ! Find out if your latest crash is due to a hardware malfunction or yet another game bug, and see all monitoring and system information in an easy-to-use interface.
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About This Software

OCCT (OverClock Checking Tool) is the best software for testing system stability, diagnosing hardware issues, and monitoring performance. Whether you're an overclocking enthusiast, a technician, or just want to ensure your PC is running smoothly, OCCT provides a powerful suite of tools to push your hardware to the limit.

  • Processor (CPU) – Evaluate your CPU’s stability and performance with various test modes.

  • Graphics Card (GPU) – Push your GPU to its limits with DirectX and CUDA-specific stress tests.

  • Memory (RAM) – Detect potential errors by putting your RAM under heavy load.

  • Power Supply (PSU) – Simulate extreme power consumption to assess PSU reliability

With OCCT’s Stability Certificates, you can validate your system’s stability like never before. After passing a complete series of stress tests, receive a personalized, shareable certificate proving your hardware's robustness. Perfect for benchmarking, troubleshooting, or simply showcasing the performance of your setup.

OCCT includes a powerful monitoring system that tracks:
✔ Temperatures (CPU, GPU, VRM…)
✔ Clock speeds and voltages
✔ Resource usage
✔ Sensor data (fans, power consumption, etc.)

After each test, OCCT generates in-depth reports to help you analyze performance and detect potential hardware issues.

With a modern and easy-to-use design, OCCT is perfect for both beginners and advanced users.

System Requirements

Windows
SteamOS + Linux
    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: Windows 10, 64bits
    • Processor: Any 64 bits CPU
    • Memory: 4 GB RAM
    • Graphics: Optional
    • DirectX: Version 12
    • Storage: 500 MB available space
    Recommended:
    • Requires a 64-bit processor and operating system
    Minimum:
    • OS: Any recent distribution
    • Processor: Any 64 bits CPU
    • Memory: 4 GB RAM
    • Graphics: Optional
    • Storage: 500 MB available space
    Recommended:

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