FPS overlay for PC Games

[Mchalo]

Hi guys I would like to be able to see my FPS and system temp in the upper left corner, like I see in many twitch streams.

I have AMD RX 480 ( not sure if this is necessary info)
I have Windows 10
I mainly want this for overwatch
Just Ask if any other info is needed to give a recommendation
Thanks

edit: What is the most common way other gamers achieve this?

 

[RaDiKaL_]

MSi Afterburner with RiVaTuner (comes default with afterburner).

 

[constantine_99]

if only wants FPS, usually Steam / Battle.net comes with their own FPS overlay
but for the system info, like GPU temps, CPU temps, yada yada etc.
u can install MSI Afterburner which comes with RivaTuner
Rivatuner also had FPS counter, u need to use the OSD function to make it shows up, u can control it in the MSI Afterburner, and then customize it in the Rivatuner