I found a number of users are reporting this same issue including on tech repair sites. At 120 light horizontal lines appear across length of screen from top to bottom, at 144 they are more intense. 100Hz and bellow they are not noticeable to me. This is frustrating for a 300+ dollar screen and I posted this in my reviews on both Amazon and Newegg. Others reported sending in screens having to pay for return shipping to only have the exact same issue. Im sorry I didnt just go with a solid 144Hz screen and I am not willing to ship the screen back and forth as I use it for School work and need it.
Secondly ACER tech had posted that their would be an ability to turn off the boot up logo, that option is not present on this screen. Also it does not auto switch inputs, I have two PC's connected and you have to manually select the input to change it. I have a Cheap ACER as a second screen that does not have this problem. I would like a firmware update released that gives the end user control over these options and something should be done about the high refresh rate horizontal line issue. It makes the screen unsuable for its designed purpose which is to deliver silky smooth 3D performance for gaming at 144Hz. Im stuck at capping everything at 100Hz which really isnt much better then my old 24" at 60Hz with Vsynch on.
If anyone has come up with a solution to the above please let me know. Hopefully the ACER techs will make some updates to the firmware soon. Thank you.