NVLinkTest.zip Contents:

Readme.txt - This file, with info about the contents of the ZIP archive.

p2pBandwidthLatencyTest.exe - A compiled version of the sample code NVIDIA supplies with the CUDA v11 Toolkit. You can run this directly via the command line, if you prefer, and So that no one sues us: "This software contains source code provided by NVIDIA
 Corporation."

NVLinkTest.exe - A small program written using AutoIt which provides a simple GUI for running the p2pBandwidthLatencyTest and interpreting the results. It will tell you if your system:

1) Does not support CUDA v11 (in which case you may need to update drivers)
2) Does not have a functioning NVLink (which may mean you don't have a bridge installed or have not set up SLI / TCC as needed)
3) Has a functioning NVLink, and if so which cards it bridges and what the test reported for bi-directional bandwidth between the cards

In case 2 or 3 above, an option is also given to save the results (the full output of the p2pBandwidthLatencyTest) to a text file. That file will be located in the same directory these programs are in, and if a file with the same name already exists it will append the results to the end of it.

For more information about how to enable NVLink, and how to use this utility, please see our article at:

https://www.pugetsystems.com/labs/support-hardware/How-to-Enable-and-Test-NVIDIA-NVLink-on-Quadro-and-GeForce-RTX-Cards-in-Windows-10-1266/