PureOverclock published a review on the Sapphire Radeon 4870 X2 graphics card
A quote from the article:
>> Sapphire Radeon 4870 X2 Review
Today we're looking at the Sapphire 4870 X2. It has been out for a while now, but it still certainly appears to be a card worthy to sit atop the heap as king of the hill. Indeed, it features two GPUs on one card, and is gigantic, in more ways than one.
>> Sapphire Radeon 4870 X2 Review