Designed specifically for older hardware that lacks UEFI firmware.
Includes a menu option to enable a serial console, which is vital for testing "headless" systems (embedded solutions without a monitor). memtest 4.3.7 download
MemTest86 version 4.3.7 is the final significant release of the "classic" BIOS-based memory testing tool developed by PassMark Software. While modern systems typically use the newer UEFI versions (Version 5 and above), version 4.3.7 remains essential for older hardware and legacy BIOS environments. Designed specifically for older hardware that lacks UEFI
Most computers manufactured after 2013 utilize UEFI (Unified Extensible Firmware Interface). However, if you are diagnosing a "legacy" machine—typically those from the Pentium 4 era through approximately 2012—the modern UEFI-only versions of MemTest86 will not boot. While modern systems typically use the newer UEFI
Specifically addresses freezes during the startup of older Pentium 4-era machines caused by multiprocessor detection.
Version 4.x was the last branch released under the GPL v2.0 license before PassMark transitioned to a proprietary "freemium" model for Version 5 and newer. Where to Download MemTest 4.3.7
You can find the 4.3.7 release through the following official and archival channels: