It reports errors by channel (e.g., A0, B1), allowing technicians to know which chip to de-solder and replace.
MATS specifically targets the Video RAM (VRAM) of NVIDIA GPUs. When a graphics card shows artifacts, crashes under load, or fails to output a signal, MATS can pinpoint exactly which physical memory chip is failing.
After the test, the tool generates a report.txt file. Look for "Write Errors" or "Read Errors" assigned to specific memory banks (A, B, C, etc.). Finding the "MATS.rar" Download Download MATS rar
Most versions are hosted on community repair forums like Repair.Wiki or specialized hardware subreddits like r/GPURepair .
If testing a card with no display output, use an integrated GPU or secondary card and specify the target index: ./mats -n 1 -e 50 . It reports errors by channel (e
(Memory Automated Test System) is a powerful, leaked internal diagnostic tool from NVIDIA used to identify faulty VRAM chips on graphics cards. It is often bundled with MODS (Modular Diagnostic Software), which performs broader GPU health checks. Core Functionality
While it supports a wide range of architectures (from the 900 series up to modern RTX 40 and 50 series), it is exclusive to NVIDIA hardware and does not work on AMD cards. How to Use MATS After the test, the tool generates a report
The tool typically runs in a minimal Linux environment booted from a USB drive.