I received my new Acer Nitro VG270UP on the 20/02/2019
At first it was an excellent monitor with my only complaint being the poor quality stand. However after a couple days of use I've started to notice some pretty severe flickering or artifacting.
The artifacting appears as a thin vertical black line that flashes on the display for a fraction of a second before vanishing, often it is too quick to get a good view of it before it disappears, similar to how you would see lightning in the sky. It usually appears about 1/3 of the way from the right side of the display. I notice it most often while browsing the internet due to the white background although I suspect that I get the issue in games too without noticing on a darker background.
My PC specs are Windows 10, Ryzen 7 2700x, 2x8GB DDR4 RAM, EVGA RTX 2070 XC Ultra. I have the issue both with the Display Port provided with the monitor, as well as with my own Display Port that has had no issues with previous monitors. I am running the latest NVidia drivers (419.17) but have had this issue with the previous drivers too. I have Freesync enabled in the OSD and have set it up in the Nvidia control panel as instructed by Nvidia.
Hopefully there is some sort of firmware update that will resolve this issue within the next 14 days or I will have to return this monitor, which I would prefer not to do seeing as how the actual display, colour and freesync functionality are excellent.