I've a AMD Radeon HD 7700 Series running under Windows 10. I work with a Ilyama PLE22070WS linked with DVI and a videoprojector Epson 475-Wi linked with hdmi.
I work with a 1280x800 resolution. The strange thing is, when a popup the "physical" menu of my monitors, they report a received resolution of 1680x1050 (for IIlyama) and 1920x1080 (for Epson projector), wich are the best resolution of these 2 displays.
It's like the image are "upsized" to the native resolution of each display by the video card before sent to the display. It's not good, especially for the Epson projector.
I have found no solution in the driver dialogs.