lol wut. I'm on an i7 with a single GTX 580 and I get very good frames.
With the game completely on ultra at 1920x1080, with everything maxed, while FRAPS is recording, with heavy smoke effects i'm maintaining 30. Mind you, this is in a full server of at least 48+. In Beta.
http://imgur.com/RN18S.jpg
http://imgur.com/HjwN6.jpg
(Second pic, Shadows were lowered from Ultra to HIGH for stability in FPS for a more enjoyable experience).
http://imgur.com/UedPz.jpg
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Here, completely maxed out including post processing:
http://imgur.com/mJHzy.jpg
http://imgur.com/oWKvo.jpg
http://i.imgur.com/e6mOd.jpg
For those that leave because of some teething issues who are going to whine on here repeating several times that they're getting a refund, go ahead and get it out of your system. I say, "Good Riddance". Playing the game on a fully populated server, I hear mostly praise. Most people see and are currently playing an amazing game underneath a few teething issues.
Mostly the performance issues people are talking about are used to low-end, console-oriented UnrealEngine 3 games where they get high FPS which just isn't going to happen with all the effects happening at any given time.
For the people who have true graphics issues like black screens, I'm hopin' you get into the fight soon enough