My brother's laptop is an ASUS ROG GL703GS-DS74 with 144hz monitor refresh rate. I can't post my brother's system info but I can share some information about stuff we've tried.

We tried lowering the refresh rate to 90hz, which caused the Nvidia Control Panel to pop up a warning about causing system instabilities and voiding the computer's warranty. This did let my brother log in w/ Directx 11 but the screen was dark, pixelated, and the game was see through making the desktop visible.

We tried Directx 9 which works for awhile but is unstable and crashes regularly.

We have been using the method of connecting to the TV via HDMI cable successfully. However, for it to work we have to switch to just using the TV for the monitor. Once in game we switch back to the laptop monitor and disconnect from the TV. More importantly, the frame limits do not seem to be working. We selected the 60 FPS cap from the System Configuration settings but the window shows in the top right corner a FPS of 143-144, so the laptop's native refresh rate basically.