Stress Test Your PC

The freeware stress test tool HeavyLoad was developed to bring your PC to its limits. It can be installed on any edition of Windows and client/server versions (32-bit and 64-bit) currently supported by Microsoft.
HeavyLoad puts your workstation or server PC under a heavy load and lets you test whether they will still run reliably.

Be mobile: Install HeavyLoad as a portable version e.g. on a USB stick and use it as your benchmarking software to go!

Startscreen HeavyLoad
Stress Test for Your Most Valuable Systems
Check your most important systems in advance to see whether they can withstand the highest loads with our computer performance test.
Tests for All System Components
No matter if CPU, GPU, RAM, hard disk, or all of them together: HeavyLoad takes it to the limit!
Easy to Use
Thanks to an intuitive graphical user interface and visual feedback, no expert knowledge is required for our benchmarking software.

Visual Tour

The main window offers a clean and modern user interface which allows to quickly start the benchmarking tool and to see the stress HeavyLoad puts on your PC.

In the HeavyLoad options, you can configure the tool according to your requirements or set advanced settings.

The Windows Task Manager can be opened from within HeavyLoad via the Extras menu to quickly assess your system's performance.

Customize the CPU stress test and define the number of processor cores used and the Windows priority.

HeavyLoad can test dedicated graphics cards from AMD and NVIDIA in all performance classes as well as integrated graphics chips (iGPUs) from Intel or AMD processors. Select or deselect them individually.


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Heavyload is a System Utilities Benchmarking software developed by JAM Software GmbH. To stress your PC or server, HeavyLoad writes a large test-file to the temp folder, it allocates physical and virtual memory, performs complex calculations and it draws patterns in its window.

More Information and Documents

Here you'll find valuable links to comprehensive guides and documentation which help you start working with HeavyLoad as quickly as possible.