OCCT Download - Stress test & benchmark for your PC

With the free OCCT download you can check whether the processor, RAM and graphics card of your PC function stably even under load. OCCT 13.1.12 offers several tests for this and can detect problems independently. You can also access benchmarks and detailed system information via the modern and beginner-friendly user interface.

OCCT Download & Installation

OCCT does not require installation and can therefore be started immediately after downloading. Portable use from a USB stick is also possible. In addition, OCCT does not require any additional programs and dependencies.

Check system stability with OCCT

OCCT (Over Clock Checking Tool) provides a number of different system tests that you can use to check the individual components of your PC. This includes tests for CPU, GPU, memory and power supply. All tests work according to the same principle: they put the selected components under high load. This means that problems with system stability or temperature development can be quickly identified.

OCCT is therefore suitable for tests after overclocking, undervolting or replacing hardware. On the official website You will find short descriptions of all tests as well as recommendations for use. Practical: OCCT can detect and record errors independently. For example, the software automatically notices artifacts generated during 3D testing, so you don’t have to look for them yourself.

Benchmarks and system information

OCCT also contains simple benchmarks for the processor and RAM, the latter even with latency and bandwidth benchmarks. An integrated system monitoring based on HWInfo displays the data from more than 200 sensors and illustrates them with graphics in real time.

Finally, OCCT provides detailed information about the installed hardware. All of OCCT’s tests are free to use. If you want to activate the ten-second waiting period before each test and run tests with an unlimited duration, you must support the project on Patreon. This will then also allow you to create stability certificates for your PC.

OCCT alternatives

Similar software is available with HeavyLoad, which also contains stress tests for different hardware components. Prime95 is another alternative for testing CPU and RAM, while Furmark puts your graphics card through its paces.