Originally Posted by Destroy
Yes, the trade off is speed vs. compatibility. Speed does me no good if I can't play the game properly or how I like.
Compatibility is just fine with the 4870x2. I can't speak for SLI since I don't own that setup. As for the 4870x2, I've yet to run across a game that didn't give me excellent framerates at 1920x1200 with AA and ASF enabled. I have no complaints at all. It just works.