http://hexus.net/tech/news/software/...analysis-tool/

Nvidia released the original FCAT performance analysis tool back in 2013. It sought to delve deeper into performance than pure FPS numbers by providing metrics which indicated the smoothness and quality of gameplay experienced on particular GPUs. With FCAT one could easily chart problems such as micro-stutters, dropped frames, incorrect multi-GPU framepacing, and more. Now Nvidia, as it had promised at GDC, has released the FCAT VR tool.