I recently started attempting to use my 27" Dell S2721DS monitor for playing video games. I have been experiencing terrible motion blur in every game. When the video game has very high frame rates it makes no difference, which makes me think it is the monitor. It makes me not want to play anymore. The image looks so good when still, when when moving, it is blurry.

This issue is especially noticeable when running the nVidia G-SYNC Pendulum Demo.

I have tried installing the video driver from Dell (https://www.dell.com/support/home/en-ca/drivers/driversdetails?driverid=5ctrk), and the latest "Game Ready" driver from nVidia (currently 536.40 for my nVidia GeForce RTX 4070 GPU).

Changing from the included HDMI cable to a new 8K DisplayPort cable didn't help.

Changing the screen setting "Response Time" to "Extreme" didn't help.

I also tried adjusting several of the NVIDIA Control Panel settings, they didn't make any difference:

• changing frame rate from 60Hz to 75hz
• enabling "Low Latency Mode" (On & Ultra):
  

  

• enabling G-SYNC (shows "Selected display is not validated as G-Sync compatible" error:
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Any other ideas?

Much appreciated