Do simply copy the ISO to a USB drive. Use a dedicated tool:
Download and Use NVIDIA Modular Diagnostic Software — Guide and Workflow
NVIDIA Modular Diagnostic Software (MODS) is a proprietary, dealer-level utility used for low-level testing and troubleshooting of NVIDIA GPUs. While it is highly sought after by hardware enthusiasts and repair technicians, it is not a consumer-grade application available through standard support channels. What is NVIDIA Modular Diagnostic Software (MODS)?
You can find detailed technical manuals and user guides uploaded to document-sharing platforms: Nvidia MODS: GPU Diagnostic Tools | PDF - Scribd