Most mmos will not recognize crossfire and may infact cause problems. You can always dual screen as long as you have 2 DVI-e ports on your card. Not sure if you can quad screen in crossfire since it puts all outputs through 1 card. You can out of crossfire.
Apparently in Lord of the Rings Online you just need to set FakeFullScreen=False to get the 2nd GPU to kick in. I know it works well in Age of Conan. Can't speak for anything else.
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Most mmos will not recognize crossfire and may infact cause problems. You can always dual screen as long as you have 2 DVI-e ports on your card. Not sure if you can quad screen in crossfire since it puts all outputs through 1 card. You can out of crossfire.
Apparently in Lord of the Rings Online you just need to set FakeFullScreen=False to get the 2nd GPU to kick in. I know it works well in Age of Conan. Can't speak for anything else.