OCCT

76KS
Released Jun 24, 2025by OCBASEVery Positive(92% of 341 Steam reviews)Recent: 98% positive

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 OCCT

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.

Game details

Game details

Released
Developer
Publisher
Platforms
Steam rating
Very Positive (92%)

Age ratings

IGRS 3DEJUS 14STEAM_GERMANY 12

Languages

OCCT player count & reviews

92% positive reviews in the last 30 days (92% all-time) · ~2 new reviews/day · 100 peak players in the last 30 days.

OCCT — frequently asked questions

How many people play OCCT?

OCCT peaked at 100 concurrent players on Steam in the last 30 days (highest on Jul 21, 2026). The player chart on this page updates daily.

How can I get OCCT at a discount?

Create a free price alert on this page and KingsPrice will email you when OCCT drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.

System requirements

Minimum

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

Recommended:
  • Requires a 64-bit processor and operating system

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