Cerilia said:

Thanks but I have the latest gtx 1080 drivers.... done everything this end including a factory reset. No joy, however its now liveable... Acer should however address this before their reputation is forever tarnished. 

Are you using 144Hz? or 165Hz? I had the same issue and I've returned the monitor back to the store. To be honest, I'm a little bit regret, because going back to FullHD 60Hz wasn't easy. Unfortunately, there are no analogues in the market of G-Sync monitors and we are forced to use monitors of poor quality :-(

Cerilia said:

Im using 144hz... the thing is I'm like you, I have a very good Ultrasharp Dell monitor @60hz but its so obvious the difference between 144hz Gsync and non Gysnc @60hz. I'd rather keep the faulty Acer over the Dell!

I heard that there is no problem if you activate 165Hz and yeah I didn't notice this issue at 165Hz (at least for one week). I decided to return the monitor back to the store, because I think that this is unacceptable for such an expensive monitor, and we shouldn't use the defective product that the manufacturer is trying to give us. I have a Dell U2414H 60Hz (overclocked to 65Hz) and yes, get used to it really hard. Btw, how often does this issue occur? Let me know if 165Hz solve your problem.

Cerilia said:

About once a day... turn off the monitor, or flick to another tab fixes it.

I dont like using 165hz, it seems to have a slight input lag.

Strange, but you're not the first person who say about the increased input lag at 165Hz. Personally, I did not notice it. At least you won't have this issue...I hope so. Do you still have the option to return the monitor back to the store? Unfortunately, there are no analogues on the 2K panel with G-Sync, but at the end of December 2018 a new 2K 165Hz panel from LG will be released, if nothing changes.

VarHyid,
This problem has existed for years and Acer has done nothing to take monitors with this issue off the market and they need to be held responsible for that either by repairing the defective units or negotiating with Nvidia to fix their G-Sync technology.  The warranty for these devices is with Acer not Nvidia so although Nvidia made the defective hardware Acer used it in their products and continues to sell them with the known defect.  Therefore Acer is responsible for making Nvidia fix the problem.  Also why are you so keen on defending Acer?  I have seen your comments on the other threads and the vast majority are defending Acer which is an interesting view given that Acer warranties these products for defects not related to improper use of the monitor or accidents.  Since Nvidia making bad hardware does not fall under improper use or an accident caused by the customer it is warrantied and you seem to think differently?

@VarHyid That's fair and yes I did see on the other thread that non G-Sync monitors were having this issue and that the panel itself might be to blame.  I respect your intentions but at the end of the day I still payed for a working monitor and that's what I intend to get from Acer even if it isn't their fault.  I hope we can figure out what hardware/firmware is actually causing this issue so we can avoid those monitors.

Cerilia said:

I just bought a new XB271HU, I just exited a game and the screen had seemed to have shifted a few pixels to the right, leaving a repeated screen on the left.

I fixed it by going into Nvidia CP and choosing Aspect ratio, instead of Full Screen.

Is this a know issue and is there an permanent fix?

Hi, im having the same issue with same monitor just on the right hand side, did you get a viable solution for a fix in the end of did you just get a replacement monitor. Mine is only 2 months old and has done it 5 times now. Im just trying to sort if its hardware or software if it the monitor ill RMA it.
Thanks

Cerilia said:

I now just live with it, as by switching the monitor off and on again fixes it. Its not ideal but I'd rather do that than send it away and get an older refurbished screen.

I've since read that its all too common for this monitor and most people solve the issue by running it OC to 165hz still with gysnc and all the rest.
I'm reluctant to return it for the reason you stated and will probably have the same issue in a month with a new one.  Besides its display quality is rather up there.

So im doing the OC thing to see if it happens again

I posted this on my thread but for anyone searching the net for a answer ill tack it onto yours cause they will end up here as i did searching for the answer.

:SOLUTION, for anyone else with this issue

 144hz this problem will occur, so enable monitor overclock mode, up refresh rate to 150hz in nvidia settings or what other driver software you have (165 is   monitor max) I have been running for just over a month now at 150hz and there has been no issue, I moved it back to 144 and within a day they problem   happened again. Since its common I decided to just keep my monitor instead of getting another one as its likely the replacement will do the same thing.

 The higher in Hz for this monitor is great but you will lessen other quality aspects of the monitors ability if you go to 165hz, but your call based on how   your eyes perceive things like pixel response etc.