marzuki, did you change the display type in display settings, some cards can't detect when HDMI is connected to screens to change the display automatically. sometimes we need to change this manually ( it's not the card really but driver versions that we use) and it's not one videocard company, it's all, just has to do with certain driver software. I noticed that when using the software that comes for your cards everything works fine, but when downloading newer or different driver/software for the cards you may need to change settings for other video outputs to work correctly.