6870 is like 2x better than the 550 ti.
I can't believe how much they rip people off with that...
you also don't ever need 2 gb of memory with a 550 ti.
^+1. More memory doesnt make cards faster, it just allows them to store larger/more textures. But if your cranking details/draw distance/textures up to fill up more than 1gb vram, the 550ti wont be able to process all that fast enough anyway and still give you low fps. so 2gb ram is a total waste on a low-mid range gfx card. There isnt a game out today that requires more than 512mb vram to run, and 1gb will normally run most games maxxed out unless your running greater than 1080p resolution, which, like i said, the 550ti is too slow for anyway.