3 In-Game Performance Monitoring Tools I Recommend to Every PC Gamer

howtogeek.com:

If you want to monitor your in-game performance stats but don’t know which tool to use, fret not. Here are three in-game performance monitoring apps I wholeheartedly recommend to every PC gamer, regardless of which hardware you're using.

NVIDIA Statistics Overlay

The NVIDIA Statistics Overlay is part of GeForce Experience and the new NVIDIA app, meaning you probably already have access to it if you own an NVIDIA graphics card. I like this one because it’s fairly simple to set up and use. While it lacks some important performance monitoring stats, such as a frame-time graph, it’s a solid choice for PC gamers who just want the basics. Perhaps the biggest disadvantage of this tool is that, naturally, it isn’t available to owners of AMD GPUs.

The NVIDIA Statistics Overlay includes an impressive suite of latency-related performance stats that include render latency (the time needed for your graphics card to fully render a single frame), mouse latency, combined PC and display latency (the time from when your OS registers your mouse click to when a frame is rendered of your monitor), and total system latency.

Setting up the overlay is pretty straightforward. Note that the following guide is for the NVIDIA app, but the procedure is quite similar if you’ve got GeForce Experience installed on your PC instead.

You can pull up the overlay when in-game by pressing Alt+R while GeForce Experience or the NVIDIA app runs in the background. To set up and tweak the overlay, press Alt+Z to open the NVIDIA overlay and then select the “Statistics” tab located at the bottom of the NVIDIA in-game overlay.

Once there, make sure to select the “Custom” statistics view, click on the "View All" button, and then simply enable the performance metrics you want to see on the statistics overlay.

You can also configure the heads-up display by clicking the "Configure Heads Up Display" button in the "Statistics" options menu.

RivaTuner Statistics Server

The legendary RivaTuner