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OCCT brand mark for stability testing software OCCT.pro
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Download OCCT

Get the latest OverClock Checking Tool for Windows and Linux. Verify every download with published checksums before installation.

Win

v16.1.10.99

Linux

Full Suite

v17

Beta Channel

SHA

Verified

Beta Channel

OCCT v17 Beta

The v17 beta introduces a major overhaul of the memory test, significant optimizations across the software, new memory test block system features and community-driven improvements. Test the latest innovations before stable release.

  • ✓ New memory test engine with presets and import/save
  • ✓ Major performance optimizations
  • ✓ Enhanced report comparison capabilities
Download v17 Beta

Source Transparency and Integrity

SHA Checksum Verification

Every official OCCT release is accompanied by a SHA-256 checksum. After downloading, verify the file hash matches the published value to confirm your installer has not been tampered with or corrupted during transfer.

Example SHA-256 (v16.1.10.99)

a2becc785df4ff89cd45d6cad7e7257b1274a44795c92e6715d12466831aac29

Use PowerShell: Get-FileHash -Algorithm SHA256 filename.exe

Digital Signature

Official OCCT installers are digitally signed by the developer. Before running the installer, right-click the file, select Properties, and check the Digital Signatures tab to verify the publisher identity.

  • ✓ Confirms the binary was signed by the official publisher
  • ✓ Detects modifications made after signing
  • ✓ Reduces SmartScreen and antivirus false positives
Full security policy →

Antivirus False Positive Clarification

Stress testing and hardware monitoring software like OCCT operates at a low system level, accessing CPU registers, GPU memory and sensor data. This behavior pattern is similar to what heuristic antivirus engines flag as suspicious, even though OCCT is legitimate diagnostic software with over 70 million downloads and 20 years of development history.

Why it happens

  • Heuristic engines flag intensive CPU/GPU manipulation
  • Low-level hardware sensor access triggers behavioral alerts
  • New release signatures not yet whitelisted by AV vendors
  • Repacked or modified copies from unofficial sources

What to do

  • Download only from this official OCCT.pro download page
  • Verify SHA-256 checksum before installation
  • Check digital signature in file properties
  • Add OCCT to your antivirus exclusion list if needed
Step-by-step antivirus guide →

Security and Integrity

🔒

No Malware

OCCT contains no adware, spyware, cryptocurrency miners or hidden payloads of any kind.

📊

70M+ Downloads

Two decades of community trust with millions of verified installations worldwide.

⚙

Open Development

Transparent release notes, public checksums and continuous development with hardware manufacturer collaboration.

System Requirements

Windows Requirements

  • Windows 10 or Windows 11 (64-bit recommended)
  • Modern x86-64 processor (Intel or AMD)
  • 4 GB RAM minimum (8 GB+ recommended for memory tests)
  • DirectX 11 compatible GPU for 3D testing
  • OpenCL 1.2+ compatible GPU for compute testing
  • 300 MB free disk space for installation
  • Administrator privileges recommended for full sensor access

Linux Requirements

  • Major Linux distributions with 64-bit kernel
  • x86-64 processor (Intel or AMD)
  • 4 GB RAM minimum (8 GB+ recommended)
  • OpenCL runtime for GPU compute testing
  • Mesa or proprietary GPU drivers for 3D testing
  • Root or sudo access for full hardware sensor readout
  • Suitable for servers, workstations and embedded targets

Version History Highlights

v17 Beta

Memory test overhaul, major optimizations, community contest

Download

v16.1.10.99

Current stable Windows release with full monitoring and testing suite

Download

v16.1.x Series

Incremental stability improvements, GPU compute enhancements, Linux expansion

Download
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