760 2gb vs 760 4gb vs 770 2gb nvidia surround

1zacster

Distinguished
Oct 8, 2012
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I want to play some nvidia surround (after trying it, it rocks) and my budget is $300. I have decided between a few options:
asus 760 2gb + sound blaster z
gigabyte 760 4gb
asus 770 2gb

The sound card isn't really a necessity for me though, so I wouldn't miss it. I want to run games on medium-max settings 5760x1080 on 60hz monitors, not 3d. I really only need to hit around 45 fps though.

EDIT: Also, I really don't care about AA or AS. I'm fine with x2/x4 or both completely off really.