Basically, all it comes down to now is drivers and BIOS. There have been reports on EVGA's forums of people having two cards that were meant to work besides one another (for more than two monitor displays) that were being picked up and used as SLI without the bridge (although the bridge is highly recommended for it's assistance in the speed gain).
If you have some-what recent drivers, and your BIOS has SLI enabled, you should be all set.