I want to know how many FPS works PUBG and other games with all in ultra graphics.

You may run into a problem where the GPU and System dropdowns at the top of HWM (Hardware Monitor) are not showing..This is a known issue.
 
Solution: Disable "Start Minimized" in Precision XOC's General Settings tab if it is enabled, then close and then open Precision XOC again..OR..When HWM is open, click in a blank area of the Precision XOC GUI to bring it into the foreground..Click the little gear icon at the bottom-right of Precision to open the Settings. 
 
Then open the System dropdown at the top of HWM where you can enable Framerate monitoring and other items..Then click the Framerate "OSD" button so that it's lit, which enables the item to be shown on-screen..The "KB" button enables the item to be shown on keyboards with LCD dislay and the "TRAY" button puts the item in the System Tray (bottom-right of Taskbar, near the clock).
 
After making any changes in HWM (or Precision settings), close Precision, then open it again or the settings may not remain when Precision runs again after a startup or reboot.
 
On-screen Display may not show up in some games..This is also a known issue.

DrunkMonk74
You can also re-size the HW monitor screen to bring up the GPU and System tabs to select what is monitored.

Doesn't work if Precision XOC is minimized.
It appears it doesn't disappear if Precision XOC is started with the setting 'Start with OS' disabled.

Y tried with the 2 ways forms. enabled and disabled start minimized and didn't work in game: Nier Automata.

regrettable what this brand doesn't work correctly and I have to turn to other brand and something else it should exist a forum in spanish as well.