Unable to identify strange issue XB270HU

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kntc
kntc Member Posts: 1 New User
edited February 16 in 2018 Archives
Acer XB270HU (1440p)
(GTX 1070)

Hi,

Can I please get some help identifying this issue with my screen?
There's a strange smudge at the top left, and I'm not sure what it is? It's only really noticeable during certain games (not all).
Doesn't appear during regular use i.e. applications, video etc. 

Have disabled G-Sync, no change.
Have disabled monitor OD, seems to reduce severity, although possibly placebo. But no change. 
Have tried another monitor (1080p), there was no marking on that monitor.
All current drivers are up to date, have tried previous drivers with no success.

Any help is greatly appreciated, thank you. 

https://i.imgur.com/3snGBis.jpg
https://i.imgur.com/vhdmpm8.jpg
https://i.imgur.com/oD5YvDt.jpg