nvgpumon is a Nvidia GPU Performance Monitor for Windows 7 x64.

From Author:
Have you been looking for a performance monitor tool for your brand new and expensive Nvidia graphics card, and didn't find anything working for a Windows 7 x64 system? Me either.
Even the brand new GPU-z tool, available in version 0.3.8 (as of 1st December, 2009) doesn't show a graph on my Windows 7 x64. See picture to the right. But I've coded a tiny tool, which is able to monitor your Nvidia GPU. It's pretty much alpha, but it shows a graph, which is the utilization of your GPU (1.0-gpu_idle). It's bleeding alpha, so it's more or less a feasibility study. But already now it can be a help, if you want to know whether your card is going some e.g. CUDA work, like Badaboom, or stuff. I'm planing to extend the feature set, add will likely add a few functionalities, like
1. rop_busy
2. geom_busy
3. shader_busy
4. texture_busy
5. savable loggin
6. temperature
7. bigger history >150 values

Inststallation:
No installation is required. Just ensure "Instrumentation" is ENABLED from your NvPerfKit. MD5 checksum will follow. Use a virus scanner, if you don't trust this site.

Troubleshooting:
* If NVPMinit report anything else, that "0", then the NVPerfKit isn't installed properly or is disabled.
* This code is really only for Windows 7 x64, it won't run on anything else. There are working monitor tools available for other Windows versions, use them.
* If feedback reflects a demand for other platforms, I'll rethink the build process.

SoftSea Editor's Note: You need to install NVIDIA PerfKit first., you can find NVIDIA PerfKit here
www.softsea.com/review/NVIDIA-PerfKit.html

The license of this software is Freeware, you can free download and free use this diagnostic software.