I am also experiencing issues with display resolution. I believe it is related to the Windows 10 display settings "Scale and Layout" option labelled "Change the size of text, apps, and other items" being set to 125%. This option works fine on Warframe prior to the Jovian Concord, and on other apps. When I have it set to 125%, and Warframe in Full Screen mode, resolution 2650x1440, only the upper left 75% (or whatever it is) of the window is showing. The lower part and right part are all clipped off the screen. My setup is ASUS ROG PG278QR on DisplayPort 2650x1440@144Hz), GPU is NVIDIA GeForce GTX 1080 Ti. The monitor/GPU are running in GSYNC mode. My workarounds are: 1. Switch to windowed mode (yuk) 2. Set the display settings to 100% making my machine useless for work and other apps (even yuckier). Although Warframe looks nice. Bottom line, my guess is that Jovian Concord has introduced a misinterpretation of the Windows "Scale and Layout" display setting.