Samsung Odyssey OLED G95SC – Visible Pixel Grid at 240Hz (Even With No Signal)

[dodsjaco]

I recently bought a Samsung Odyssey OLED G95SC and noticed a visible grid/pixel structure at high refresh rates.

The grid:

• is clearly visible at 240 Hz

• is much less visible at 120 Hz / 144 Hz

• shows up even on the OSD and HDMI “no signal” screen

• appears regardless of GPU, cable, or software settings

I confirmed:

• The lines/grid appear even with no PC connected → not GPU/CPU/drivers

• Changing Windows to 120 Hz doesn’t fix it unless I also change it in the monitor OSD

• Switching the monitor itself to 120 Hz removes most of the grid

• Picture mode matters — Sports Mode reduces the grid strongly
  
  
  

[meself]

Run the tv diagnostic

[dodsjaco]

have already done that. It appears very visible at 240 and less visible at 120. 

[dodsjaco]

I also am on the latest software.  60 fps flawless, 120 is okay,  and 240 sucks.