Originally Posted by Bman212121
You are starting a war. It isn't always the fastest card because it relies on the driver to make sure crossfire mode works. If it doesn't work then it's a lot slower.
a lot slower? the 280 is only about 10 to 15% faster than a single 4870 1gb anyway, so even if crossfire failed its only going to be about 10 to 15% slower on avg. to answer ops question the 4870x2 is the fastest card followed by the 280.