Do not simply copy the ISO to a USB drive. Use a dedicated tool:
For Windows users:
For Linux/macOS users:
Use dd command:
sudo dd if=NVIDIA_Mods_v5.3.2.iso of=/dev/sdX bs=4M status=progress
(Warning: Replace /dev/sdX with your actual USB device – triple-check!)
NVIDIA Modular Diagnostic Software (MODS) is a powerful, low-level testing suite used primarily for GPU hardware validation, failure analysis, and debugging. It is most famous in the repair community for its MATS (Memory Automated Test Subsystem)
module, which identifies specific faulty VRAM chips on a graphics card. How to Obtain MODS/MATS
NVIDIA does not officially distribute MODS to the general public; it is an internal tool intended for board partners and authorized repair centers. To download it, users typically rely on community-shared resources: Online Archives:
You can find version-specific ZIP files (e.g., for Pascal, Turing, or Ampere architectures) by searching for "NVIDIA MODS download" on tech forums or specialized archives. Community Discord Servers: Platforms like the Tech Cemetery Discord
are known for hosting curated versions and "cloned" bootable images that simplify the setup. Documentation Guides: Detailed usage manuals are often available on sites like Repair Wiki Installation & Setup
Because MODS interacts directly with hardware, it cannot run within a standard Windows environment. Create a Bootable Drive: Use a tool like to create a bootable USB drive using or a lightweight environment (like Tiny Linux). Copy Software:
Extract the downloaded MODS ZIP file directly onto the root of the USB drive. Configure Scripts: Most users modify the autoexec.bat file to automate the testing process upon booting. Using the Software MATS (VRAM Testing):
To test memory, run the MATS module. A common command for a basic test is ./mats -e 20 is the amount of megabytes to test. Interpreting Results: After the test, the software generates a report.txt
file. This report lists memory "bits" or "banks" that failed, allowing you to identify exactly which physical chip on the PCB needs replacement. Compatibility:
Different versions of MODS are required for different GPU generations (e.g., version 367.x for older cards vs. 455.x for newer RTX series). Publicly Available Alternatives
If you prefer official, user-friendly tools for basic diagnostics: download nvidia modular diagnostic software
NVIDIA Modular Diagnostic Software (MODS) and its companion tool MATS are highly effective, professional-grade diagnostic utilities for identifying hardware-level faults and dead video memory (VRAM) chips on NVIDIA graphics cards. However, they are not official consumer products and are strictly meant for advanced users and repair technicians. ⚠️ Critical Warning
No Official Download: NVIDIA does not publicly distribute MODS/MATS to consumers.
Security Risk: Any download link found on the internet is an unofficial third-party leak. You download and use it at your own risk of malware or system damage.
Extreme Complexity: This is not standard Windows software. It requires creating custom bootable Linux or FreeDOS USB drives and navigating command-line arguments. 📊 Overview of the Software
The software stack is divided into two primary, highly specialized utilities: MODS (Modular Diagnostic Software):
Used to test the core GPU chip and various board components.
Can run custom manufacturer-level execution scripts to stress test the architecture. MATS (Memory Automated Test System):
Specifically targets the VRAM banks to identify exact failing chips.
Generates a detailed log file (like mats.log or spacemods.log) that maps out which memory channel (A, B, C, etc.) is spitting out read/write errors. 👍 The Good
Pinpoint Accuracy: It tells technicians exactly which physical VRAM chip on the board is failing so they know what to desolder and replace.
Ultimate Verification: It can confirm whether bizarre visual artifacts are caused by hardware failure or just a buggy video game. 👎 The Bad Nvidia Modular diagnostic software - MODS - RkBlog
If you are a GPU hardware repair technician, you may be looking for the private diagnostic tools used for debugging hardware faults.
Summary for immediate action:
NVIDIA Modular Diagnostic Software (MODS) is a proprietary, internal-only tool suite used to test graphics cards for faults, primarily focusing on GPU and VRAM diagnostics. Availability & Download Information Do not simply copy the ISO to a USB drive
Official Status: MODS is not officially available for public download from NVIDIA. It is intended for authorized repair centers and internal use.
Unofficial Sources: The software has leaked into the public domain and is frequently found on third-party repair forums (e.g., VLab.su) or hardware enthusiast communities.
Versions: Common public versions include 367.38.1 (older), 400.184 (supports RTX/Turing), and newer releases like 455.127. Key Components The software package typically includes two primary tools:
MODS: Used for general GPU hardware testing and identifying board-level faults.
MATS (Modular Automated Test System): Specifically designed for testing VRAM integrity. It generates detailed logs identifying specific faulty memory banks (e.g., Bank A0, B1). Installation & Setup Requirements
MODS usually runs in a standalone Linux environment or via FreeDOS to bypass standard Windows driver interference.
Bootable Media: Use tools like Rufus to create a bootable USB drive.
Primary Display: To test a discrete GPU, you often need an Integrated GPU (iGPU) or a secondary card to view the output, as the test card may not display a signal during the process.
Documentation: Downloaded packages often contain a mods.pdf or mats.pdf manual that details command-line arguments and test configurations. Typical Usage Workflow
Prepare: Format a USB drive and copy the MODS/MATS binaries and configuration files.
Configure: Edit the ARGS or autoexec.bat file to specify the type of test (e.g., -matsinfo for memory diagnostics).
Boot: Enter the system BIOS and set the USB as the primary boot device, ensuring Legacy/CSM support is enabled. Execute: Run the mods or mats command in the terminal.
Review: Check the resulting text file (e.g., report.txt or mods.log) to see which memory chips failed. AI responses may include mistakes. Learn more Nvidia GPU Memory Testing Guide - Repair Wiki
NVIDIA Modular Diagnostic Software (MODS) is an internal-only tool For Linux/macOS users: Use dd command: sudo dd
used by NVIDIA and OEMs for deep GPU validation and failure analysis. Because it is not officially released to the public, finding a legitimate download requires caution, as most available versions are community-distributed "leaks". 1. Understanding MODS and MATS
MODS is a powerful diagnostic suite typically run in a specialized Linux environment. It consists of two primary components:
Used for comprehensive testing of the GPU chip itself and general board functionality. A submodule specifically designed to diagnose VRAM (Video RAM)
issues. It can pinpoint which specific memory bank is failing, which is crucial for identifying "artifacts" or crashing caused by bad memory chips. 2. Where to Download
Since there is no official public download link from NVIDIA, users typically source it from the following community hubs: Repair Communities: Forums like Levirepair Repair Wiki
provide links to "VRAM test tool" images that include various versions of MODS/MATS. Tech Forums:
Communities such as the Tech Cemetery Discord or Russian repair forums are common sources for the latest leaked archives. Safety Warning:
Be extremely careful when downloading these files. Always use a secondary computer or a secure environment to create the bootable media, and verify the sources through community reputation. 3. How to Set Up and Use
The software generally cannot be run from within Windows; it requires a bootable USB drive Prepare the USB: Download an image (typically an file) and use a tool like
to write it to a USB drive (2GB to 8GB is usually sufficient). Boot the System:
Boot your PC from the USB drive. You may need to use integrated graphics or a secondary GPU for display if the card under test has no output. Run the Tests: Once in the Linux environment, use commands like ./modsinit to initialize the environment. To start a standard memory test, type ./mats -n [index] -e [size] ./mats -n 1 -e 50 to test 50MB of VRAM on the first card). Interpret Results: The results are saved as a text file (often report.txt
). Look for "errors" listed by channel (e.g., Channel A1, B0) to identify which physical memory chip needs replacement. Summary of Tools and Sources Tool to create the bootable USB Download Rufus Levirepair Forum
Community-maintained images for newer GPUs (RTX 30/40 series) Levirepair Tools Repair Wiki Detailed documentation and usage guides NVIDIA GPU Testing Guide for a particular GPU model? Nvidia Modular diagnostic software - MODS - RkBlog