I got a barebones Win7 desktop machine with (I believe) integrated motherboard graphics, that has only the 15-pin monitor output. I think I want to use it as Home Theater PC, which means I need/want one or more HDMI output(s). I don't do any gaming, just want to use it watch videos. I might be upgrading to a 4K UHDTV. So, do I need anything other than the cheapest barebones graphics card to play 4K videos over HDMI? AFAIK the only reason for an expensive graphics card is for rendering graphics in gaming; I suspect for playing videos where the graphics are already rendered, you're just playing back a recording, and nothing special is required. BUT there there things I don't know about, like transcoding and such, so I ask.