Weird rectangle on Acer GF276 monitor

Vorpal

I recently purchased a GF276 monitor.
(UM HG6AA A01)

When I view the background with no windows open, I see a shadowy rectangle roughly centred in the screen that is 800 x 500 pixels in size.

The rectangle is only on the background, and appears whether I have a picture or not.

The rectangle is not filled in.
I have 3 monitors connected to my NVIDIA GeForce GTX 960.
This one is connected to a DisplayPort, one is connected using DVI, and the third is connected via HDMI

This is the only monitor that shows this.
I can find no setting in the OSD, nor in the NVIDIA control panel that would control this.

Any ideas?

Thanks,

--VS

Sharanji

Vorpal 
Have you checked this monitor by connecting it to another port?
If you are using Chrome, click on Chrome menu, select Settings > Advanced Settings, scroll down under system, and check the box adjacent to ‘Use Hardware Acceleration when available’ option.

You can also try turning this option off in Chrome helps: chrome://flags/#disable-slimming-paint

Open that as an URL in Chrome. It might ask you turn the option off, if so, turn it off.

Let us know if anything helped.

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