Originally Posted by
Djinni
To my understanding, it is completely possible to run 2 separate cards that aren't linked in SLI and aren't even the same model or brand.
The onboard graphics output will be plenty sufficient for Movies, Videos and pre-rendered graphics, Even some light gaming... just don't be expecting to load up any modern game (World of Warcraft, Crysis2, Skyrim, SW:TOR etc..) and get more than 30fps.
You can quite comfortably extend your windows desktop to the TV and have the desktop span the 3 screens, even videos and games if you like... although not something I've personally bothered with more than once to prove it could be done, given the disproportionate size and distance of the TV)
I currently have 2 monitors connected to my Nvidia 560Ti and a TV connected via my onboard graphics (ASUS P8Z68 V-PRO, i7 2600k) and have very few issues. (only one I have right now is for some reason I am unable to play MP4's via the TV... I suspect because of some hardware acceleration setting I haven't been able to find yet) When we want to watch regular TV we just switch the input on the TV to DTV, when we want to watch movie's or DVD's etc... we switch it to HDMI (PC) no problems.
It is also possible to configure the setup with various sound output preferences (Typically I have Vent on the headset, game/windows sounds on the speakers and movies/dvd's etc.. on the TV) all of which is controlled by my onboard sound card. It is also possible to switch it round so that you have all your sound on the speakers, tv, or headset as you wish. assuming you have a "sound" connection to the TV (HDMI, optical,coax etc...)