For watching 3d movies on your computer you need:
1. Graphics card that's able to output 3d videos (usually nvidia cards have that, AMD is limited to lower resolution).
2. TV OR monitor that can receive the signal.
I believe GT 520 is the cheapest card that supports it. It can output 3d videos via HDMI 1.4a port, so you should look for a TV or Monitor that supports 3d via HDMI 1.4a.
P. S. Don't spam. You will get answered, and don't expect answers within few minutes or even few hours.