Why is 3/4 of my screen black on 144Hz.

Hi Mihai952

Welcome to Microsoft Community.

Based on your description, I understand that your screen doesn't black out when set to 60hz, but it blacks out 3/4 of the way when set at 144hz, and I understand very well how you feel!

But from your description mentioning that you can open apps on the black part, it means that the system should be problematic or the apps will not be able to open.

Thank you very much for the photos, as far as the pictures you provided, there is a suspected line down the middle of the black screen and the normal screen. I will give you some solutions based on this and hopefully it will solve your problem successfully!

Option 1: You as well try to uninstall the driver and let the system install it automatically, it will take a few minutes to wait for the problem to be solved.

Please allow me to explain to you that the driver you uninstalled and installed in Device Manager is a generic driver provided by Windows, and may not display the high refresh screen properly due to poor compatibility or an old driver.

I suggest you download the driver for the relevant device from NVIDIA website and install it to improve the driver compatibility.

Option 2: You can try to safely boot your computer and set it to 144hz to see if the problem still exists.

For safe boot you can refer to: Windows startup settings - Microsoft Support.

Because safe boot can effectively troubleshoot third-party software, drivers and other conflicts that cause the problem, if the problem disappears after you safe boot, you can try to uninstall some other drivers with recently installed, updated and frequently used third-party software.

Option 3: Check the monitor related settings in the NVIDIA control panel to see if they are successful.

Right-click on desktop -> select "NVIDIA Control Panel" -> check the monitor related settings and change them according to your needs

Because I found that the settings in the control panel can override the settings in the system, which eventually leads to similar issues.

Option 4: You can try to disable the integrated graphics and just use a discrete graphics card to output the screen and see if the problem still exists.

To disable the integrated graphics card, you need to enter the BIOS to perform the relevant operations, you can through the official website of the notebook brand to check the BIOS and disable the integrated graphics card document or video, to avoid operating errors and other problems.

Please note: Some notebooks may not boot up after disabling the integrated graphics, or may have a black screen after booting. In this case, you just need to enter the BIOS to re-enable the integrated graphics card.

I sincerely hope that the above solution will solve your problem. Please feel free to contact me if you have any problems or still can't solve them. (Photos related to the question would be great!) .

I look forward to hearing back from you. 

Best Regards

Arthur Sheng | Microsoft Community Support Specialist