Theoretically it should be no problem.
On the other hand the manual gives the impression, that your rig supports only 2 monitors in total.
Ask the manufacturer if there is a limitation (presumably in the BIOS).
Use Multiple Monitors
If users connect an additional monitor to the notebook, the system will automatically detect the external monitor connected. Users will be allowed to customize the display settings.
• Connect the monitor to the notebook.
• Press and hold the Windows key, and then press [P] key to bring up [Project].
• Select how you want your display to project on the second screen from the selections of PC screen only, Duplicate, Extend, and Second screen only.
thanks for the input.
You're right, theortically
I wouild like even to turn off laptop display to have ony two external, but its impossible. Even when i switch HDMI display to be connected to DP its not recognized by windows or intel graphics. System says that inputs are under control of intel graphics so I assume problem lays down here