CPU-Z - CPU-Z is a freeware that gathers information on some of the main devices of your system : Processor name and number, codename, process, package, cache levels.
Prime95 - Prime95 is a program that searches for new Mersenne prime numbers.
Speccy - Speccy - find the details of your computer's specs. Great for spotting issues or finding compatible upgrades. Download the latest version free.
HeavyLoad - The individual test methods employed by HeavyLoad can be customized to fit your needs.
HWiNFO - Professional System Information and Diagnostics. Comprehensive Hardware Analysis, Monitoring and Reporting for Windows and DOS. FREEWARE. download. Advertisements.
System Stability Tester - System Stability Tester - Test your system's stability and performance by calculating millions of digits of Pi.