with PRECISION and AFTERBURNER go to settings, monitoring, click on what you want to see then on that page lower down it says 'show in on-screen display' and click that for each thing you want shown in-game and in the 'on-screen display' settings section choose a button to toggle it on/off in-game. And on the bottom right of desktop applications thing click the PRECISION or AFTERBURNER with a bright colour'd number 60 logo to setup stuff like on-screen display size, colour, text shadow. In the monitoring options put the 'Hardware Polling Period' to a lower number for faster readings
EVGA PRECISION displays it name above the readings and MSI AFTERBURNER doesn't.
This is with MSI AFTERBURNER showing Temp, Usage,Voltage, Fan Usage & Core Frequency