And yes, gaming performance will drop if you play movies at the same time. I hope we are not going to repeat the discussion why.
Bob
I have a fairly lower end gaming setup consisting of an FX-4100, GTX 650TI, 550W XFX PSU, and a Gigabyte GA-78LMT-S2 Mobo. I have the graphics card connected to my 23" 1080p Asus Monitor. I would like to connect my computer to my 720p Tv for throwing a video/movie on every now and again. This way, I will not have to sit at my desk to watch videos/movies. I'm not sure whether connecting my TV to the graphics card as a second monitor will lower my gaming performance or not. I also have the GT 610 that I upgraded from in the closet that I believe I could connect, and use for the second monitor, as well. I need some suggestions/advice on how I should connect my TV to my desktop in order to get the best performance and usability out of it.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic