Tweaktown published a review of the Sapphire Radeon HD 4870 in Crossfire.

Quote from the review: "Given the level of excitement the HD 4850 left, not only with us, but also gamers and enthusiasts all over the world, the HD 4870 quickly became extremely anticipated by people. Will it beat the GTX 260? - How much faster than the HD 4850 is it? - Can it out-perform the GTX 280? - How does Crossfire scale?
These are all questions that we want answered, and today we intend to have answers for all of them. On paper the HD 4870 looks to be the right card for a lot of people. On the internet, looking at early prices it also seems to be the right one. Ultimately though, what it’s going to come down to is performance."
Read the full review on Tweaktown.