Windows CPU load generator. This software is designed to test how a server performs under reduced CPU resources.
It is not a CPU stress tool. A CPU stress tool produces a 100% load on all CPUs by means of various instructions.
  • Selectable CPU load from 20% up to 90%. Load rate is achieved by means of a regulation mechanism so it is accurate and stable.
  • Selectable logical CPUs (screenshot below is for a 2 cores system).
  • Does not require administrator rights.
Operating system
This tool is designed to run under Windows, on the .NET Microsoft Framework (version 2.0).
It is probably too OS specific to be able to run under a .NET Framework port to Linux (Mono or the Microsoft Core .NET Framework for Linux and Mac).
Using this software
  • Select processor load rate.
  • Check processors to be loaded.
The "?" menu gives a little more information.
Known issue
Although this tool performs a load regulation, on high load rate, when some other software is running, CPU load rate may rise for a few percent from selected load rate.
Do not rely on Windows Task Manager to perform an accurate CPU use measure. Use SysInternals Process Explorer External Link from Microsoft instead, and select all CPUs.
Licence, Setup, and Downloading
Go to MultiCpuLoad download page.