Based on your request, you are likely looking for information regarding the platform (often confused with "Modular") or NVIDIA's diagnostic tools for GPU health.
: As leaked internal software, downloading MODS from unofficial sources carries a high risk of malware. These downloads are not vetted by NVIDIA.
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)
A specialized tool within MODS specifically for identifying faulty VRAM chips. It provides a report detailing exactly which memory bank is failing. Obtaining and Using MODS/MATS