So Tigerdirect says it supports Crossfire. Even if that’s true that doesn’t mean it supports SLI. They aren’t the same by far and aren’t interoperable.
Even if Tiger’s right and it does support Crossfire, it’s only at x8x8 which pretty much sucks. Most of the mid-range Intel boards are x16x16x8, with the x16x16 being for gaming and the x8 for a physics or tertiary monitor-only card.
Also, I wouldn’t trust Tiger. They’re wrong. ALOT.