I saw yesterday that i had a little black thingy on my computer and i removed it and then i saw a HDMi port but when i plug my TV through a HDMI cable nothing happens it doesnt show up, Do i have to activate it or something?
it's the onboard card. it got automatically disabled when you plugged the discreet card. you should use the hdmi on the graphics card. or a dvi to hdmi adapter
the outputs exist on the motherboard because it supports also the normal cpu-s that have integrated graphics. so you can't unless you get a vga to hdmi active adapter and use the vga port next to the dvi ports. you could connect one of the monitors on vga instead of dvi and get a dvi to hdmi for the tv.