Start64!Bring your PC to its limits with the freeware stress test tool HeavyLoad. HeavyLoad puts your workstation or server PC under a heavy load and lets you test whether they will still run reliably. The individual test methods employed by HeavyLoad can be customized to fit your needs. On a system featuring multiple processor cores, for example, you can select how many of the available cores shall be used or set the speed in which the test file is to be written on your hard disk.

Stress CPU
Use your processor or even a specific number of processor cores to full capacity. HeavyLoad performs complex calculations to simulate the load on your processor.

Write Test File
Check how your system behaves when faced with dwindling disk space. HeavyLoad writes a test file to your hard disk with variable speed. You can define the amount of remaining disk space; once this limit is reached, HeavyLoad overwrites the file again and again until more disk space is freed up.


HeavyLoad 64-bit version


Allocate Memory
You would like to test how well your computer works with scarce memory? HeavyLoad can help: it reserves memory and even allows you to define how much memory should be kept free and how fast the memory should be allocated.

Simulate Disc Accesses
How much can your hard disk take? Is it reliable? With a combination of HeavyLoad and the scan function of TreeSize Free , you can find out today. HeavyLoad simulates a number of hits on files and folders on all local disks.


HeavyLoad 64-bit version


Stress GPU
How does your graphics card handle stress? With HeavyLoad you can utilize your graphics card processor to capacity. HeavyLoad employs a 3D rendered graphic to simulate a high load on the GPU.

Use HeavyLoad everywhere
Be mobile: Install HeavyLoad as a portable version e.g. on a USB stick and use it wherever needed!

Supported Operating Systems

  • Windows 8  (32 Bit / 64 Bit)
  • Windows 7  (32 Bit / 64 Bit)
  • Windows Vista  (32 Bit / 64 Bit)
  • Windows XP  (32 Bit / 64 Bit)
  • Windows Server 2008  (32 Bit / 64 Bit)
  • Windows Server 2003  (32 Bit / 64 Bit)


HeavyLoad 64-bit version
HeavyLoad - 64-bit software