Transparency

Trust & Security

Our commitment to transparency, ethical usage, software integrity and user safety. OCCT is built on 20 years of trust with over 70 million verified downloads.

70M+

Verified Downloads

Years of Development

Malware Payloads

100%

Local Diagnostics

Security

No Malware Clarification

OCCT (OverClock Checking Tool) is legitimate hardware diagnostic software. It does not contain malware, adware, spyware, cryptocurrency miners, keyloggers, remote access tools or any hidden payloads of any kind.

With over 70 million downloads across 20 years of continuous development, OCCT is one of the most widely used and trusted stability testing applications in the world. The software operates entirely as a local diagnostic tool focused on hardware validation.

What OCCT does NOT do

Collect, store or transmit personal user data
Install bundled third-party software or toolbars
Display advertisements or promotional content
Modify system files outside of its own installation directory
Run background processes after the application is closed

Policy

Legal Usage Policy

OCCT is legal software intended for legitimate hardware testing, diagnostics, quality assurance and stability validation. Users may employ OCCT for personal overclocking, commercial PC building, RMA technician workflows, industrial burn-in testing and enterprise infrastructure validation.

Permitted Uses

Testing hardware you own or have written authorization to test
Commercial QA for PC building, prebuilt systems and warranty validation
Industrial burn-in and reliability testing in production environments
Educational and research purposes in controlled environments
Generating and sharing stability certificates for validated systems

Prohibited Uses

Testing systems without the owner's knowledge or consent
Intentionally using stress tests to damage hardware or disrupt services
Redistributing modified or tampered copies of OCCT installers
Misrepresenting stability certificates for systems that failed testing
Any use that violates applicable local, national or international laws

Ethics

Ethical Usage Statement

OCCT is a powerful diagnostic tool that pushes hardware to its operational limits. With this capability comes responsibility. We expect all users to apply ethical standards when conducting hardware stress tests.

Responsible testing

Always ensure adequate cooling and power delivery before running extended stress tests. Monitor temperatures continuously and stop tests if components exceed safe operating limits.

Honest reporting

Stability certificates represent genuine test results. Do not falsify, manipulate or misrepresent certificate data. Accurate reporting protects the integrity of the OCCT certification ecosystem.

Authorized access only

Test only systems you own or have explicit permission to evaluate. Unauthorized testing on third-party systems is unethical and may be illegal.

Community integrity

Report false antivirus detections to help improve industry-wide heuristic accuracy. Share knowledge and best practices to help the hardware testing community grow responsibly.

Openness

Open Development Transparency

OCCT maintains transparency through verifiable release practices, public development communication and direct collaboration with hardware manufacturers. While distributed as freeware, OCCT upholds open development principles that build community trust.

Published Checksums

Every release includes SHA-256 hashes so users can independently verify download integrity before installation.

Signed Binaries

Official installers carry digital signatures from the publisher, verifiable through standard operating system tools.

Public Release Notes

Version changelogs, beta programs and feature announcements are communicated openly to the user community.

Hardware Partnerships

Direct collaboration with hardware manufacturers ensures fast support for emerging technologies and accurate sensor integration.

OCCT stability certificate example showing verified hardware validation

Disclaimer

User Responsibility Disclaimer

OCCT is provided as-is for legitimate hardware testing and diagnostic purposes. By downloading, installing or using OCCT, you acknowledge and accept the following responsibilities and limitations.

Hardware risk

Stress testing pushes components beyond normal operating conditions. Users are solely responsible for ensuring adequate cooling, power supply capacity and safe operating parameters. OCCT is not liable for hardware damage resulting from inadequate system configuration, pre-existing component defects or extreme overclock settings.

Data backup

While OCCT does not intentionally modify user data, system instability during testing may rarely cause operating system crashes. Back up important data before running extended stress tests.

Download verification

Users are responsible for downloading OCCT only from official sources and verifying file integrity through published checksums and digital signatures. OCCT.pro is not responsible for damages caused by tampered or unofficial copies obtained from third-party sources.

Compliance

Users must ensure their use of OCCT complies with all applicable laws, regulations and organizational policies in their jurisdiction and workplace.

No warranty

OCCT is provided without warranty of any kind, express or implied. Test results are diagnostic indicators and do not guarantee future system reliability under all conditions.

Verify Before You Trust

Trust is earned through verification, not assumptions. Follow these three steps every time you download OCCT.

Official Source

Download only from OCCT.pro

SHA-256 Check

Verify file hash matches published value

Digital Signature

Confirm publisher in file properties

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