Better performance from upgrading or crossfiring?

Itzviral

Distinguished
Dec 23, 2009
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18,510
Hi all, I currently have a lone Sapphire 6870 powering an eyefinity display at 5780x1920. It can't quite handle some games (As i expected when i purchased it), so I was wondering at this point: Will I get better performance from buying a second 6870 and crossfiring them, or would i get more out of a brand new card like a 6950? Possibly a 6970 but that's a bit out of my price range.

Really hoping that the second 6870 will yield better results because thats much more affordable!