A:AnswerYou should be able to downscale to 1080P through NVIDIA Control Panel or AMD's Varient Software. And naturally will be able to return to it's native 1440P Resolution.
A:Answerno it cannot. I have this monitor and nowhere in settings does it allow to go higher than the 144hz it claims but other than this is still a great monitor for the price. Only downside to this monitor is the single display and hdmi port.