Help! Which one is better for me?

I don't know which video card is better..

1.http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5316156&CatId=3669

or

2.http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=6655890&CatId=3669


My computer specs (important):
8GB DDR3 RAM
3.0ghz intel core i3 processor
1TB HARD DRIVE


What I use my computer to?
Watch, edit HD videos and photos.
Playing Games (HD) but not super high resolution games. Just Normal HD Games.

Which one is better for me?

I'd get this http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=6491183&CatId=3670

The ones I posted are better... look at the specifications...

Check this out. http://www.guruht.com/2010/09/radeon-hd-5770-vs-geforce-gts-450-vs.html