![]() The source code of MemTest86 (BIOS version) and of the MemTest86+ fork is released under the GNU General Public License (GPL). The bootloading code was originally derived from Linux 1.2.1. The program is compiled as position-independent code so as to be able to move itself around and test all the memory regions. Both versions now support current multi-core processors and the corresponding chipsets. ![]() Starting from MemTest86 2.3 and Memtest86+ 1.60, the program can output a list of bad RAM regions in the format expected by the BadRAM patch for the Linux kernel. GRUB2 is able to supply this same information to an unpatched kernel, making the BadRAM patch unnecessary. Microsoft Windows has a similar feature (badmemorylist/badmemoryaccess), but manual conversion is required for setting it up. In February 2013, the original MemTest86 was sold to PassMark. Supported OS: Windows 11, Windows 10, Windows 8.The BIOS version was updated under GPL until version 4.3.7.Technical Details and System Requirements Dual booting - Will boot to V4 in BIOS and V7 in UEFI from a single flash drive.Network (PXE) boot - Scalable, disk-less provisioning from a single PXE server.Self-booting off USB without needing DOS, Linux, or Windows.Foreign language support (Chinese, German & more).Graphical interface, mouse support, and logging of results to disk.Secure boot - With MemTest86 being code signed by Microsoft.ECC RAM - support for error-correcting code RAM.64bit - From version 5, MemTest86 is native 64bit code.UEFI - The new graphical standard for BIOS.System builders, PC repair stores, overclockers & PC manufacturers often use it. ![]() MemTest86 can help diagnose faulty RAM (or rule it out as a cause of system instability). Insufficient RAM is one of the most frustrating computer problems, as symptoms are often random and hard to pin down. Unreliable RAM can cause many problems: corrupted data, crashes, and unexplained behavior. ![]() (So there is no need for a future product called MemTest64). This covers both 32-bit and 64-bit machines. The number 86, following the MemTest part of the name, refers to the original x86 CPU instruction set that all of today's PCs use. MemTest86 boots from a USB flash drive and tests the RAM in your computer for faults using a series of comprehensive algorithms and test patterns. Free Download PassMark MemTest86 Pro for Windows is the original, free, stand-alone memory testing software for x86 computers. ![]()
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