Memtest86+ | The Open-Source Memory Testing Tool

This website is for Memtest86+, an open-source, free memory testing tool for 32- and 64-bit architecture computers. Memtest86+ provides a more thorough memory check than standard BIOS tests and can be run directly by a PC BIOS or via an intermediate bootloader. It's compatible with Pentium class CPUs and later, and is licensed under the GNU GPL v2.0. The tool uses various algorithms to detect memory failures and is useful for troubleshooting PC instabilities and ensuring initial system stability before using a new computer or server.