Please provide some more information on your system and this problem.
1
Right click your Start Button and open Device Manager.
Expand the 'Graphics Adapters' section.
Please provide a screenshot of that full Device Manager window.
2
Click your Start Button, then just type msinfo and press Enter, please provide a screenshot of the resulting System Information window.
3
When you indicate the Intel integrated graphics is not used over 120, do you mean when you try to set the refresh rate on your screen to 120Hz?