Prime95 by Platform & Version
Prime95 ships in different forms on different systems, and modern CPU generations behave differently under its AVX workloads. This hub collects the platform-specific guides and the version explainers in one place.
Platform facts (from the official packages)
Windows is the only platform with a GUI. The Windows build is prime95.exe and runs from an extracted folder. Linux and macOS use mprime, a command-line program started with ./mprime -m; there is no Mac .app or DMG. The Mac build is Intel x86_64 only, so Apple Silicon Macs run it through Rosetta 2. A FreeBSD build and a Windows service build also exist on the official download page.
Platform and version guides
Prime95 on Ryzen 7000 & 9000
Stress testing modern AMD Ryzen systems: what to watch in temperatures, clocks and memory settings.
Prime95 on Intel 13th & 14th Gen
Testing Intel 13th and 14th generation systems, based on Intel’s own published guidance only.
Prime95 on Windows 11
Prime95 runs as a portable Windows program with full GUI. Setup notes specific to Windows 11 systems.
Prime95 on Windows 10
The same GUI build runs on Windows 10. What to check before a long Torture Test session.
Prime95 on a Laptop
Laptops have strict power and cooling limits. How to test sensibly without expecting desktop behaviour.
Prime95 for Older Pre-AVX CPUs
CPUs without AVX use different code paths. Version choices for older machines, including the 26.6 story.
What’s New in Prime95 30.19
The seven documented changes in the current release, taken only from the official whatsnew.txt file.
Does Prime95 Test the GPU?
No. Prime95 is a CPU and RAM tool. This page explains the common misunderstanding and points to the right tools.
Version background
The full release timeline is on the version history page, and the much-searched older release has its own explainer: Prime95 26.6, the last pre-AVX version. For the current release itself, go to the download page.