https://www.jam-software.com/heavyload/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.
Download: zip version for both x86 and x64 architectures
Version tested: 3.31
Portable: Yes, if you create an empty file named GlobalOptions.config (or you can download the installer and install HeavyLoad as portable version by choosing a folder on your USB-Stick during the installation and activate "Install as portable version" in the following dialog).
Stealth: Yes (test file created in system's Temp folder does not count)
Online help file: https://www.jam-software.com/heavyload/manual.php
Supported operating systems: Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008 and Windows 7, Windows 8, Windows 8.1, Windows 10, including the 64Bit editions
License: freeware