AleGr MEMTEST is a legacy, specialized memory diagnostic program designed primarily for older, x86-based PC-compatible systems. Created by Alexander Grigoriev, it evaluates DRAM integrity by accounting for how system buses, processor caches, and main memory interact.
Because it is an older tool, it comes with strict limitations and specific usage instructions compared to modern utilities like PassMark MemTest86. ⚠️ Critical Hardware Warnings
Notebook Overheating: If you are testing a laptop or notebook, be aware that AleGr MEMTEST exercises chipset data buffers aggressively. It can cause excessive current demand, which might trip your laptop’s overcurrent protection circuit and cause it to shut down unexpectedly.
Size Limitations: The DOS version cannot test more than 3 GB to 4 GB of RAM. The Windows version can only test a maximum of 2 GB of RAM. Method 1: Testing under “Bare” DOS (Recommended)
Running the tool under pure DOS is the most accurate way to use it because it prevents operating system processes from blocking the memory space.
Obtain the Software: You can find AleGr MEMTEST as a standalone freeware download on older benchmarking hubs like BenchmarkHQ. Alternatively, it comes pre-packaged on legacy multi-tool environments like the Ultimate Boot CD (UBCD).
Boot Into DOS: Create a bootable DOS USB drive using a tool like Rufus, or boot into the Ultimate Boot CD. Navigate to the memory testing section and launch AleGr MEMTEST.
Handle Large RAM Capacities: If your system has more than 4 GB of RAM, you must physically remove memory sticks so that only 4 GB or less is installed at one time. Test the first batch, swap them out for the remaining modules, and repeat the test.
Run the Test: Let the test run through at least one full pass. If errors are detected, the program will halt and display the specific failing memory addresses. Method 2: Testing under Windows (98, ME, 2000, XP)
The program can run directly inside older versions of Windows, though it is less thorough because it cannot test sectors already locked by the OS.
Launch the Executable: Run the Windows version of the software on a compatible operating system.
Set the Allocation: Specify the amount of free memory to test (keeping it under 2 GB).
Evaluate Paging: This specific mode is helpful for analyzing hard drive paging file performance alongside the physical RAM space. Modern Alternatives
If you are working with a modern computer (built within the last 15–20 years) featuring a 64-bit architecture, UEFI BIOS, or large capacities of DDR3, DDR4, or DDR5 RAM, AleGr MEMTEST is not compatible. Instead, you should use: How To Use Memtest86 – Test your RAM
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