we have computer at home, 1 of them rx470 & the other one vega 56, rx470 used on Black Hawk G-MASTER GB2530HSU and Acer XF250Q, both monitor experienced blackscreen, before using freesync monitor, no issues at all. Bought myself a new Vega 56, used on Acer XF250Q, black screen issues again. I have tried display port and hdmi, both have the same issues. Currently using latest driver and also fresh window was installed.
