Prime95 is a program that searches for new Mersenne prime numbers. It is commonly used as a stability test for overclocked computers.
Cost / License
- Free
- Proprietary
Platforms
- Mac
- Windows
- Linux




Cpukiller is described as 'CPUKILLER is a software capable of slowing down your computer up to 99% permitting you to run old software' and is an app in the gaming software category. There are more than 10 alternatives to Cpukiller for a variety of platforms, including Linux, Windows, Android, Cinnamon and GNOME apps. The best Cpukiller alternative is Prime95, which is free. Other great apps like Cpukiller are CPU Frequency Selector, SetCPU, HeavyLoad and Auto-CPUFreq.
Prime95 is a program that searches for new Mersenne prime numbers. It is commonly used as a stability test for overclocked computers.




cinnamon-cpufreq-applet - Port of Gnome 3 CPUFreq applet to Cinnamon - with some fixes.

SetCPU is a tool for changing the CPU settings (capable of overclock and underclock) on a rooted Android device, to improve performance or save battery.



The individual test methods employed by HeavyLoad can be customized to fit your needs. Can stress test CPU, hard disk, memory and GPU.


An automatic CPU speed and power optimizer for Linux that helps to improve battery life in laptops.

CPU Usage Limiter for Linux - cpulimit is a simple program which attempts to limit the cpu usage of a process (expressed in percentage, not in cpu time). This is useful to control batch jobs, when you don't want them to eat too much cpu.

Limits CPU power to applications based on percentage CPU limit (per target process) ou or suspend target processes. The program permit add process using wildcard and actions triggered.


No-frills CPU Control is a tool you can use on your rooted device to quickly set the CPU frequencies and governor to use.




Ananicy (ANother Auto NICe daemon) — is a shell daemon created to manage processes' IO and CPU priorities, with community-driven set of rules for popular applications (anyone may add their own rule via github's pull request mechanism). It's mainly for desktop usage.
StressMyPC is stress testing software, to do a PC stability test ergo computer stress test at fully load of the hardware.


One is a stress test, the other an cpu speed emulator for old fashioned and badly written programs.