The name OCCT comes from OverClock Checking Tool. This application will let you benchmark and overclock your system components. OCCT is the most popular all-in-one stability check and stress test tool available.

It generates heavy loads on your components while checking for errors, and will detect stability issues faster than anything else. OCCT embeds HwInfo's monitoring engine to get precise readings and diagnose issues faster.

Features

  • Up to 16-core support ( for instance, up to a Quad-Kentsfield or an Octo-Conroe )
  • Customizable tests ( Duration, Priority, CPU or RAM, ... )
  • CPU and Motherboard detection
  • Monitoring support through 3rd party application ( i.e. MBM5, Speedfan and Everest Ultimate Edition 3.50 or above )
  • Can produce graphs showing temperature and voltages during the test : Unique feature !
  • Multi-language support

Don't let your work go to waste

Ensure your computer is stable before working on your beloved projects - don't let a reboot or memory corruption put your hard work to waste

Is this a game bug or my computer?

Find out by stress-testing your components. If anything's wrong, OCCT will pick it up and tell you ! By having a wide-range of test integrated, you'll be able to pinpoint which one is faulty.

Stop wasting time with after-sale services

Find out which component is faulty and gain time by giving after-sale services proof your hardware is faulty. I don't promise you it'll go smooth, but at least, you'll have backup.

Modern monitoring dashboard

Create easy-to-read, attractive monitoring dashboards showing how your component is behaving in real-time.

Check your cooling

OCCT test will make your components go all out. If anything is wrong with your cooling, you'll quickly know.

The ultimate CPU test

OCCT's CPU test gives you full control on which core is tested - Cycle through cores, know which one generated an error, invert them... Lots of fun there.

Squeeze every MHz of your components

OCCT will help you pinpoint ideal values for your overclocked components and ensures rock-stable day-to-day usage.

What's New

  • Fixed: The autoupdate will properly restart OCCT and stop displaying a cmd box upon updating. As the issue is in the client, OCCT 12.0.0 and 12.0.1 will still exhibit this bug when auto updating to 12.0.2 or later versions. Starting from 12.0.2, this behavior will be gone.
  • Monitoring: The top-level bar will now remember the CPU&GPU selected
  • Monitoring: The top-level bar will try to auto-select a relevant GPU instead of the first one, which was often the iGPU
  • SysInfo: Added motherboard infos to system information
  • SysInfo: Fixed an exception that could occur if the number of physical cores and logical cores was badly detected ( mostly on older CPUs)
  • Settings: Added an option to save a debug file with system information and monitoring information - will come in handy to improve the top level bar auto-sensor picking
  • Stability Certificate: Fixed : the duration was off in the text of the UI ( the stability certificate durations were right, this is just a display issue )
  • Translation: Not forgetting about you translators, bugfixes are occuring in a side branch, please bear with me
  • Fixed : The Drive flag for monitoring wasn't working
  • Fixed : The about window was not displaying license status and HwInfo version
  • Fixed : A memory leak would occur when OCCT was minimized and the graphs were displayed
  • Fixed : a dependency was missing, causing a crash of the test when started on bare Windows installations
  • Fixed : The GPU select option (and test all GPUs) was missing from the Power test